%trace%

adj. capable of preventing conception or impregnation; as, contraceptive devices and medications.
Syn. -- prophylactic. [ WordNet 1.5 ]

n. a substance or device used to prevent conception.
Syn. -- preventive, preventative, contraceptive device, prophylactic device, prophylactic. [ WordNet 1.5 ]

n. a natural family of heathlike shrubs including the crowberry (Empetrum nigrum).
Syn. -- family Empetraceae, crowberry family. [ WordNet 1.5 +PJC ]

adj. located or occurring outside of a living cell or cells; as, extracellular fluid. Opposite of intracellular. [ WordNet 1.5 ]

a. (Biol.) Within a cell; as, the intracellular movements seen in the pigment cells, the salivary cells, and in the protoplasm of some vegetable cells; intracellular enzymes. Contrasted with extracellular. [ 1913 Webster +PJC ]

a. Incapable of being retraced; not retraceable. [ 1913 Webster ]

{ } n. (Bot.) A name given to several species of the orchidaceous genus Spiranthes, in which the white flowers are set in spirals about a slender axis and remotely resemble braided hair. [ 1913 Webster ]

‖n. pl. [ NL., fr. Gr. 'o`strakon shell of a testacean. ] (Zool.) A division of bivalve mollusks including the oysters and allied shells. [ 1913 Webster ]

n. [ L. ostrea an oyster. See Oyster. ] (Zool.) Any one of a family of bivalves, of which the oyster is the type. [ 1913 Webster ]

v. t. [ Pref. re- + trace: cf. F. retracer. Cf. Retract. ] 1. To trace back, as a line. [ 1913 Webster ]

Then if the line of Turnus you retrace,
He springs from Inachus of Argive race. Driden. [ 1913 Webster ]

2. To go back, in or over (a previous course); to go over again in a reverse direction; as, to retrace one's steps; to retrace one's proceedings. [ 1913 Webster ]

3. To trace over again, or renew the outline of, as a drawing; to draw again. [ 1913 Webster ]

n. [ F. trais. pl. of trait. See Trait. ] 1. One of two straps, chains, or ropes of a harness, extending from the collar or breastplate to a whiffletree attached to a vehicle or thing to be drawn; a tug. [ 1913 Webster ]

2. (Mech.) A connecting bar or rod, pivoted at each end to the end of another piece, for transmitting motion, esp. from one plane to another; specif., such a piece in an organ-stop action to transmit motion from the trundle to the lever actuating the stop slider. [ Webster 1913 Suppl. ]

n. [ F. trace. See Trace, v. t. ] 1. A mark left by anything passing; a track; a path; a course; a footprint; a vestige; as, the trace of a carriage or sled; the trace of a deer; a sinuous trace. Milton. [ 1913 Webster ]

2. (Chem. & Min.) A very small quantity of an element or compound in a given substance, especially when so small that the amount is not quantitatively determined in an analysis; -- hence, in stating an analysis, often contracted to tr. [ 1913 Webster ]

3. A mark, impression, or visible appearance of anything left when the thing itself no longer exists; remains; token; vestige. [ 1913 Webster ]

The shady empire shall retain no trace
Of war or blood, but in the sylvan chase. Pope. [ 1913 Webster ]

4. (Descriptive Geom. & Persp.) The intersection of a plane of projection, or an original plane, with a coordinate plane. [ 1913 Webster ]

5. (Fort.) The ground plan of a work or works. [ 1913 Webster ]

Syn.-Vestige; mark; token. See Vestige. [ 1913 Webster ]

v. t. [ imp. & p. p. traced p. pr. & vb. n. tracing. ] [ OF. tracier, F. tracer, from (assumed) LL. tractiare, fr.L. tractus, p. p. of trahere to draw. Cf. Abstract, Attract, Contract, Portratt, Tract, Trail, Train, Treat. ] 1. To mark out; to draw or delineate with marks; especially, to copy, as a drawing or engraving, by following the lines and marking them on a sheet superimposed, through which they appear; as, to trace a figure or an outline; a traced drawing. [ 1913 Webster ]

Some faintly traced features or outline of the mother and the child, slowly lading into the twilight of the woods. Hawthorne. [ 1913 Webster ]

2. To follow by some mark that has been left by a person or thing which has preceded; to follow by footsteps, tracks, or tokens. Cowper. [ 1913 Webster ]

You may trace the deluge quite round the globe. T. Burnet. [ 1913 Webster ]

I feel thy power . . . to trace the ways
Of highest agents. Milton. [ 1913 Webster ]

3. Hence, to follow the trace or track of. [ 1913 Webster ]

How all the way the prince on footpace traced. Spenser. [ 1913 Webster ]

4. To copy; to imitate. [ 1913 Webster ]

That servile path thou nobly dost decline,
Of tracing word, and line by line. Denham. [ 1913 Webster ]

5. To walk over; to pass through; to traverse. [ 1913 Webster ]

We do tracethis alley up and down. Shak. [ 1913 Webster ]

v. i. To walk; to go; to travel. [ Obs. ] [ 1913 Webster ]

Not wont on foot with heavy arms to trace. Spenser. [ 1913 Webster ]

a. Capable of being traced. -- Trace"a*ble*ness, n. -- Trace"a/bly, adv. [ 1913 Webster ]

n. One who, or that which, traces. [ 1913 Webster ]

2. A person engaged (esp. in the express or railway service) in tracing, or searching out, missing articles, as packages or freight cars. [ Webster 1913 Suppl. ]

3. An inquiry sent out (esp. in transportation service) for a missing article, as a letter or an express package. [ Webster 1913 Suppl. ]

4. (Mil.) a type of ammunition that emits light or smoke as it moves toward its target, providing a visible path of the projectile in flight so that the point of impact may be observed; -- called also tracer ammunition. [ PJC ]

5. (Mil.) the chemical substance used in tracer ammunition to cause it to be visible in flight. [ PJC ]

6. a chemical substance with properties, such as radioactivity or fluorescence, which make it easily measurable, used to observe the movements of chemically related substances through a biological, physical, or chemical system; -- in biochemistry, also called labeled compounds. Radioactive tracers are used, for example, to measure the retention or distribution of residues of drugs after administration to an animal, to determine the type and rate of metabolism; also, to measure the rate of motion of molecules in electrophoresis or the leakage of small quantities of material from a container. Small fluorescent tracers may be attached in many cases to macromolecules such as proteins or nucleic acids, allowing the motions of such macromolecules to be easily observed by their acquired fluorescence, without appreciably changing their properties. In biological and biochemial systems the common radioactive isotopes used in tracers are carbon-14, tritium (hydrogen-3), sulfur-35, phosphorus-32, and iodine-131; other isotopes are also used, including non-radioactive isotopes such as carbon-13. [ PJC ]

n.; pl. Traceries /plu> (Arch.) 1. Ornamental work with rambled lines. Especially: -- (a) The decorative head of a Gothic window. [ 1913 Webster ]

☞ Window tracery is of two sorts, plate tracery and bar tracery. Plate tracery, common in Italy, consists of a series of ornamental patterns cut through a flat plate of stone. Bar tracery is a decorative pattern formed by the curves and intersections of the molded bars of the mullions. Window tracery is imitated in many decorative objects, as panels of wood or metal either pierced or in relief. See also Stump tracery under Stump, and Fan tracery under Fan. [ 1913 Webster ]

(b) A similar decoration in some styles of vaulting, the ribs of the vault giving off the minor bars of which the tracery is composed. [ 1913 Webster ]

2. A tracing of lines; a system of lines produced by, or as if by, tracing, esp. when interweaving or branching out in ornamental or graceful figures. “Knit with curious tracery.” Burns. [ Webster 1913 Suppl. ]

See obnoxious.
See observable.
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See obvious.
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See ordinary.
See ordinate.
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See writable.
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------ and the like.
[ 1913 Webster ]