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n. A kind of half boot, or high shoe, with laces over the tongue; -- named from the Prussian general Blücher. Thackeray. [ 1913 Webster ]

‖ [ L. camera chamber + L. lucidus, lucida, lucid, light. ] (Opt.) An instrument which by means of a prism of a peculiar form, or an arrangement of mirrors, causes an apparent image of an external object or objects to appear as if projected upon a plane surface, as of paper or canvas, so that the outlines may conveniently traced. It is generally used with the microscope. [ 1913 Webster ]

v. t. To call together, or call to follow, as a hen does her chickens. [ 1913 Webster ]

She, poor hen, fond of no second brood,
Has clucked three to the wars. Shak. [ 1913 Webster ]

n. 1. The call of a hen to her chickens. [ 1913 Webster ]

2. A click. See 3d Click, 2. [ 1913 Webster ]

v. i. [ imp. & p. p. Clucked p pr. & vb. n. Clucking. ] [ AS. cloccian; cf. D. klokken, G. glucken, glucksen, LG. klukken, Dan. klukke; all prob. of imitative origin. ] To make the noise, or utter the call, of a brooding hen. Ray. [ 1913 Webster ]

n. The noise or call of a brooding hen. [ 1913 Webster ]

n. [ L. colluctari to struggle with. ] A struggling to resist; a striving against; resistance; opposition of nature. [ Obs. ] [ 1913 Webster ]

n. [ L. colluctatio, fr. colluctari to struggle with; col- + luctari to struggle. ] A struggling; a contention. [ Obs. ] [ 1913 Webster ]

Colluctation with old hags and hobgoblins. Dr. H. More. [ 1913 Webster ]

n. [ Dextro- + glucose. ] (Chem.) Same as Dextrose. [ 1913 Webster ]

a. [ L. dilucidus, fr. dilucere to be light enough to distinguish objects apart. See Lucid. ] Clear; lucid. [ Obs. ] Bacon. -- Di*lu"cid*ly, adv. [Obs.] -- Di`lu*cid"i*ty n. [ Obs. ] [ 1913 Webster ]

v. t. [ L. dilucidatus, p. p. of dilucidare. ] To elucidate. [ Obs. ] Boyle. [ 1913 Webster ]

n. [ L. dilucidatio. ] The act of making clear. [ Obs. ] Boyle. [ 1913 Webster ]

v. t. [ imp. & p. p. Elucidated p. pr. & vb. n. Elucidating ] [ LL. elucidatus, p. p. of elucidare; e + lucidus full of light, clear. See Lucid. ] To make clear or manifest; to render more intelligible; to illustrate; as, an example will elucidate the subject. [ 1913 Webster ]

n. [ Cf. F. élucidation. ] A making clear; the act of elucidating or that which elucidates, as an explanation, an exposition, an illustration; as, one example may serve for further elucidation of the subject. [ 1913 Webster ]

a. Making clear; tending to elucidate; as, an elucidative note. [ 1913 Webster ]

n. One who explains or elucidates; an expositor. [ 1913 Webster ]

a. Tending to elucidate; elucidative. [ R. ] [ 1913 Webster ]

v. i. [ L. eluctatus, p. p. of eluctari to struggle out; e + luctari to wrestle. ] To struggle out; -- with out. [ Obs. ] Bp. Hacket. [ 1913 Webster ]

n. [ L. eluctatio. ] A struggling out of any difficulty. [ Obs. ] Bp. Hall. [ 1913 Webster ]

v. i. [ L. elucubratus, p. p. of elucubrare to compose by lamplight. ] See Lucubrate. [ Obs. ] Blount. [ 1913 Webster ]

n. [ Cf. F. élucubration. ] See Lucubration. [ Obs. ] Evelyn. [ 1913 Webster ]

n. [ It. feluca (cf. Sp. faluca, Pg. falua), fr. Ar. fulk ship, or harrāqah a sort of ship. ] (Naut.) A small, swift-sailing vessel, propelled by oars and lateen sails, -- once common in the Mediterranean. Sometimes it is constructed so that the helm may be used at either end. [ 1913 Webster ]

n. (Biochem.) a type of luciferin produced by the firefly Photinus pyralis. Its structure has been elucidated, and chemically it is recognized as 4, 5-Dihydro-2-(6-hydroxy-2-benzothiazol-2-yl)-4-thiazolecarboxylic acid, C11H8N3O2S2. It has found use in a very sensitive assay for ATP, in which concentrations of ATP as low as 10-11 molar can be detected. [ MI11 ] [ PJC ]

n. [ Corrupted fr. fleur-de-lis. ] (Bot.) A genus of perennial herbs (Iris) with swordlike leaves and large three-petaled flowers often of very gay colors, but probably white in the plant first chosen for the royal French emblem. [ 1913 Webster ]

☞ There are nearly one hundred species, natives of the north temperate zone. Some of the best known are Iris Germanica, I. Florentina, I. Persica, I. sambucina, and the American I. versicolor, I. prismatica, etc. [ 1913 Webster ]

n. (Mining) Soft clayey matter in the vein, or surrounding it. [ Written also flookan, flukan, and fluccan. ] [ 1913 Webster ]

a. [ L. fluctus wave + -ferous. ] Tending to produce waves. Blount. [ 1913 Webster ]

a. [ L. fluctisonus; fluctus wave + sonus sound. ] Sounding like waves. [ 1913 Webster ]

n. The capacity or ability to fluctuate. [ R. ] H. Walpole. [ 1913 Webster ]

a. [ L. fluctuans, p. pr. of fluctuare. See Fluctuate. ] 1. Moving like a wave; wavering; (Med.) showing undulation or fluctuation; as, a fluctuant tumor. [ 1913 Webster ]

2. Floating on the waves. [ Obs. ] Bacon. [ 1913 Webster ]

v. i. [ imp. & p. p. Fluctuated p. pr. & vb. n. Fluctuating ] [ L. fluctuatus, p. p. of fluctuare, to wave, fr. fluctus wave, fr. fluere, fluctum, to flow. See Fluent, and cf. Flotilla. ] 1. To move as a wave; to roll hither and thither; to wave; to float backward and forward, as on waves; as, a fluctuating field of air. Blackmore. [ 1913 Webster ]

2. To move now in one direction and now in another; to be wavering or unsteady; to be irresolute or undetermined; to vacillate.

Syn. -- To waver; vacillate; hesitate; scruple. -- To Fluctuate, Vacillate, Waver. -- Fluctuate is applied both to things and persons and denotes that they move as they are acted upon. The stocks fluctuate; a man fluctuates between conflicting influences. Vacillate and waver are applied to persons to represent them as acting themselves. A man vacillates when he goes backward and forward in his opinions and purposes, without any fixity of mind or principles. A man wavers when he shrinks back or hesitates at the approach of difficulty or danger. One who is fluctuating in his feelings is usually vacillating in resolve, and wavering in execution. [ 1913 Webster ]

v. t. To cause to move as a wave; to put in motion. [ R. ] [ 1913 Webster ]

And fluctuate all the still perfume. Tennyson. [ 1913 Webster ]

adj. moving irregularly in an oscillatory manner, especially up and down; as, fluctuating prices. [ WordNet 1.5 ]

n. [ L. fluctuatio; cf. F. fluctuation. ] 1. A motion like that of waves; a moving in this and that direction; as, the fluctuations of the sea. [ 1913 Webster ]

2. A wavering; unsteadiness; as, fluctuations of opinion; fluctuations of prices. [ 1913 Webster ]

3. (Med.) The motion or undulation of a fluid collected in a natural or artifical cavity, which is felt when it is subjected to pressure or percussion. Dunglison. [ 1913 Webster ]

a. [ Gr. &unr_; sweet. ] (Chem.) Pertaining to, or obtained from, sugar; as, glucic acid. [ 1913 Webster ]

n. [ Cf. F. glycine, glucine. So called because it forms sweet salts. See Glucinum. ] (Chem.) A white or gray tasteless powder, the oxide of the element glucinum; -- formerly called glucine. [ 1913 Webster ]

a. (Chem.) Pertaining to, derived from, or containing, glucinum; as, glucinic oxide. [ 1913 Webster ]

n. [ Cf. F. glucinium, glycium, fr. Gr. &unr_;, sweet. Cf. Glycerin. ] (Chem.) A rare metallic element, of a silver white color, and low specific gravity (2.1), resembling magnesium. It never occurs naturally in the free state, but is always combined, usually with silica or alumina, or both; as in the minerals phenacite, chrysoberyl, beryl or emerald, euclase, and danalite. It was named from its oxide glucina, which was known long before the element was isolated. Symbol Gl. Atomic weight 9.1. Called also beryllium. [ Formerly written also glucinium. ] [ 1913 Webster ]

n. [ R. ] See Glycogen. [ 1913 Webster ]

n. Glycogenesis. [ R. ] [ 1913 Webster ]

a. Pertaining to, or derived from, glucose. [ 1913 Webster ]

Gluconic acid (Chem.), an organic acid, obtained as a colorless, sirupy liquid, by the oxidation of glucose; -- called also maltonic acid, and dextronic acid. [ 1913 Webster ]

n. [ Gr. &unr_; sweet. Cf. Glycerin. ] [ 1913 Webster ]

1. A variety of sugar occurring in nature very abundantly, as in ripe grapes, and in honey, and produced in great quantities from starch, etc., by the action of heat and acids. It is only about half as sweet as cane sugar. Called also dextrose, grape sugar, diabetic sugar, and starch sugar. See Dextrose. [ 1913 Webster ]

2. (Chem.) Any one of a large class of sugars, isometric with glucose proper, and including levulose, galactose, etc. [ 1913 Webster ]

3. The trade name of a sirup, obtained as an uncrystallizable reside in the manufacture of glucose proper, and containing, in addition to some dextrose or glucose, also maltose, dextrin, etc. It is used as a cheap adulterant of sirups, beers, etc. [ 1913 Webster ]

n. [ See Glucose. ] (Chem.) One of a large series of amorphous or crystalline substances, occurring very widely distributed in plants, rarely in animals, and regarded as influental agents in the formation and disposition of the sugars. They are frequently of a bitter taste, but, by the action of ferments, or of dilute acids and alkalies, always break down into some characteristic substance (acid, aldehyde, alcohol, phenole, or alkaloid) and glucose (or some other sugar); hence the name. They are of the nature of complex and compound ethers, and ethereal salts of the sugar carbohydrates. [ 1913 Webster ]

‖n. [ NL., fr. E. glucose + Gr. &unr_; urine. ] (Med.) A condition in which glucose is discharged in the urine; diabetes mellitus. [ 1913 Webster ]

a. (Anat.) Of or pertaining to the hallux. [ 1913 Webster ]

v. i. [ L. hallucinatus, alucinatus, p. p. of hallucinari, alucinari, to wander in mind, talk idly, dream. ] 1. To wander; to go astray; to err; to blunder; -- used of mental processes. [ R. ] Byron. [ 1913 Webster ]

2. Specifically: To perceive a non-existent object or phenomenon; to believe that one is experiencing something which in reality does not exist; to experience a hallucination{ 2 }. [ PJC ]

v. t. To experience (something nonexistent) as an hallucination{ 2 }. [ PJC ]

adj. Experiencing hallucinations.
Syn. -- delirious. [ WordNet 1.5 +PJC ]

n. [ L. hallucinatio: cf. F. hallucination. ] 1. The act of hallucinating; a wandering of the mind; error; mistake; a blunder. [ 1913 Webster ]

This must have been the hallucination of the transcriber. Addison. [ 1913 Webster ]

2. (Med.) The perception of objects which have no reality, or of sensations which have no corresponding external cause, arising from disorder of the nervous system, as in delirium tremens; delusion. [ 1913 Webster ]

Hallucinations are always evidence of cerebral derangement and are common phenomena of insanity. W. A. Hammond. [ 1913 Webster ]