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a. Hostile. [ R. ] Southey. [ 1913 Webster ]

n. [ Gr. &unr_; clear + &unr_; to observe. ] An instrument consisting in part of a differential thermometer. It is used for measuring changes of temperature produced by different conditions of the sky, as when clear or clouded. [ 1913 Webster ]

n. One versed or engaged in agriology. [ 1913 Webster ]

n. [ Gr. &unr_; wild, savage + -logy. ] Description or comparative study of the customs of savage or uncivilized tribes. [ 1913 Webster ]

(Geol.) A period in the American eocene, the lowest in the tertiary age except the lignitic. [ 1913 Webster ]

a. [ L. alacer, alacris. ] Brisk; joyously active; lively. [ 1913 Webster ]

'T were well if we were a little more alacrious. Hammond. [ 1913 Webster ]

adv. With alacrity; briskly. [ 1913 Webster ]

n. Alacrity. [ Obs. ] Hammond. [ 1913 Webster ]

‖n. [ F. alérion, LL. alario a sort of eagle; of uncertain origin. ] (Her.) Am eagle without beak or feet, with expanded wings. Burke. [ 1913 Webster ]

n. [ Gr. 'allo`trios strange + fagei^n to eat: cf. F. allotriophagie. ] (Med.) A depraved appetite; a desire for strange or nonnutritious food, such as clay or starch. Called also pica. AS [ 1913 Webster ]

adj. 1. victorious in every battle. [ WordNet 1.5 ]

a. [ L. amatorius, fr. amare to love. ] Amatory. [ Obs. ] “Amatorious poem.” Milton. [ 1913 Webster ]

a. [ L. anterior, comp. of ante before. ] 1. Before in time; antecedent. [ 1913 Webster ]

Antigonus, who was anterior to Polybius. Sir G. C. Lewis. [ 1913 Webster ]

2. Before, or toward the front, in place; as, the anterior part of the mouth; -- opposed to posterior. [ 1913 Webster ]

☞ In comparative anatomy, anterior often signifies at or toward the head, cephalic; and in human anatomy it is often used for ventral. [ 1913 Webster ]

Syn. -- Antecedent; previous; precedent; preceding; former; foregoing. [ 1913 Webster ]

n. [ LL. anterioritas. ] The state of being anterior or preceding in time or in situation; priority. Pope. [ 1913 Webster ]

adv. In an anterior manner; before. [ 1913 Webster ]

n. (Med.) A remedy possessing the property of preventing the return of periodic paroxysms, or exacerbations, of disease, as in intermittent fevers. [ 1913 Webster ]

a. Preventing the contagion of smallpox. [ 1913 Webster ]

‖ [ L. a (ab) + posterior latter. ] 1. (Logic) Characterizing that kind of reasoning which derives propositions from the observation of facts, or by generalizations from facts arrives at principles and definitions, or infers causes from effects. This is the reverse of a priori reasoning. [ 1913 Webster ]

2. (Philos.) Applied to knowledge which is based upon or derived from facts through induction or experiment; inductive or empirical. [ 1913 Webster ]

‖ [ L. a (ab) + prior former. ] 1. (Logic) Characterizing that kind of reasoning which deduces consequences from definitions formed, or principles assumed, or which infers effects from causes previously known; deductive or deductively. The reverse of a posteriori. [ 1913 Webster ]

3. (Philos.) Applied to knowledge and conceptions assumed, or presupposed, as prior to experience, in order to make experience rational or possible. [ 1913 Webster ]

A priori, that is, from these necessities of the mind or forms of thinking, which, though first revealed to us by experience, must yet have preëxisted in order to make experience possible. Coleridge. [ 1913 Webster ]

n. [ Cf. F. apriorisme. ] An a priori principle. [ 1913 Webster ]

n. The quality of being innate in the mind, or prior to experience; a priori reasoning. [ 1913 Webster ]

a. [ L. arbitrarius. See Arbitrary. ] Arbitrary; despotic. [ Obs. ] -- Ar`bi*tra"ri*ous*ly, adv. [Obs.] [1913 Webster]

a. [ L. arenarius, fr. arena sand. ] Sandy; as, arenarious soil. [ 1913 Webster ]

prop. n. 1. 1 a genus of slow-growing geophytic cacti; northern and eastern Mexico; southern Texas.
Syn. -- genus Ariocarpus. [ WordNet 1.5 ]

n. [ L. ariolatio, hariolatio, fr. hariolari to prophesy, fr. hariolus soothsayer. ] A soothsaying; a foretelling. [ Obs. ] Sir T. Browne. [ 1913 Webster ]

prop. n. In Greek legend, a fabulous horse, the offspring of Poseidon by Demeter (or, in other accounts, Gaea or a harpy) who to escape him had metamorphosed herself into a mare. It was successively owned by Copreus, Oncus, Heracles, and Adrastus. It possessed marvelous powers of speech, and its right feet were those of a man. [ Century Dict. 1906 ]

a. [ It. arioso, fr. aria. ] Characterized by melody, as distinguished from harmony. [ 1913 Webster ]

Mendelssohn wants the ariose beauty of Handel; vocal melody is not his forte; the interest of his airs is harmonic. Foreign Quart. Rev. [ 1913 Webster ]

‖adv. & a. [ It. ] (Mus.) In the smooth and melodious style of an air; ariose. [ 1913 Webster ]

n. [ Gr. &unr_; + -graphy. ] A systematic description of the arteries. [ 1913 Webster ]

adj. 1. of or pertaining to an arteriole. [ WordNet 1.5 ]

/mhw>, n. [ NL. arteriola, dim. of L. arteria: cf. F. artériole. ] A small artery with a muscular wall. [ 1913 Webster +PJC ]

n. [ Gr. &unr_; + -logy. ] That part of anatomy which treats of arteries. [ 1913 Webster ]

n. [ Gr. 'arthri`a + -logy. ] (Med.) a form of arteriosclerosis which affects predominantly the arterioles, found especially in people with chronic hypertension. Stedman [ PJC ]

‖n. [ NL.; Gr. &unr_; artery + sclerosis. ] (Med.) a chronic disease characterized by abnormal thickening and hardening of the walls of the arteries, esp. of the intima, occurring mostly in old age. Subtypes are distinguished, such as arteriolosclerosis and atherosclerosis. -- Ar*te`ri*o*scle*rot"ic a. [Webster 1913 Suppl. +PJC]

adj. 1. of or pertaining to arteriosclerosis. [ WordNet 1.5 ]

n. [ L. arteriotomia, Gr. &unr_;; &unr_; + &unr_; a cutting. ] 1. (Med.) The opening of an artery, esp. for bloodletting. [ 1913 Webster ]

2. That part of anatomy which treats of the dissection of the arteries. [ 1913 Webster ]

adj. 1. connecting an artery to a vein. an arteriovenous fistula [ WordNet 1.5 ]

a. Of or pertaining to Assyriology; as, Assyriological studies. [ 1913 Webster ]

n. One versed in Assyriology; a student of Assyrian archæology. [ 1913 Webster ]

n. [ Assyria + -logy. ] The science or study of the antiquities, language, etc., of ancient Assyria. [ 1913 Webster ]

{ ‖‖ } n. pl. [ NL., fr. Gr. 'asteri`as + -oid. See Asterias. ] (Zool.) A class of Echinodermata including the true starfishes. The rays vary in number and always have ambulacral grooves below. The body is star-shaped or pentagonal. [ 1913 Webster ]

‖n. [ Gr. 'aste`rion starry. ] (Anat.) The point on the side of the skull where the lambdoid, parieto-mastoid and occipito-mastoid sutures. [ 1913 Webster ]

{ } a. [ LL. atrabilarius, fr. L. atra bilis black bile: cf. F. atrabilaire, fr. atrabile. ] Affected with melancholy; atrabilious. Arbuthnot. [ 1913 Webster ]

a. [ Cf. F. atramentaire. See Atramentaceous. ] Like ink; suitable for making ink. Sulphate of iron (copperas, green vitriol) is called atramentarious, as being used in making ink. [ 1913 Webster ]

adj. 1. 1 relating to or affecting the atria and ventricles of the heart. atrioventricular disease
Syn. -- auriculoventricular. [ WordNet 1.5 ]

a. Of or pertaining to bacteriology; as, bacteriological studies. [ 1913 Webster ]

n. One skilled in bacteriology. [ 1913 Webster ]

n. [ Bacterium + -logy. ] (Biol.) The branch of microbiology relating to bacteria. [ 1913 Webster ]