n. 1. 1 a genus of woody climbers of tropical Asia to Australia.
Syn. -- genus Argyreia. [ WordNet 1.5 ]

n. 1. a compound of protein and silver used as a mild antiseptic; Argyrol is the trademark.
Syn. -- mild silver protein. [ WordNet 1.5 ]

n. 1. 1 a genus comprising the orange tortrix.
Syn. -- genus Argyrotaenia. [ WordNet 1.5 ]

n. 1. 1 a small genus of Hawaiian spreading and rosette-forming shrubs.
Syn. -- genus Argyroxiphium. [ WordNet 1.5 ]

n. an aircraft that is supported in flight by unpowered rotating horizontal wings (or blades); forward propulsion is provided by a conventional propeller.
Syn. -- autogiro, gryoplane [ WordNet 1.5 ]

n. [ Gr. ke`ras horn + 'a`rgyros silver. ] (Min.) Native silver chloride, a mineral of a white to pale yellow or gray color, darkening on exposure to the light. It may be cut by a knife, like lead or horn (hence called horn silver). [ 1913 Webster ]

v. t. & i. [ Pref. circum- + gyrate. ] To roll or turn round; to cause to perform a rotary or circular motion. Ray. [ 1913 Webster ]

n. The act of turning, rolling, or whirling round. [ 1913 Webster ]

A certain turbulent and irregular circumgyration. Holland. [ 1913 Webster ]

a. Moving in a circle; turning round. Hawthorne. [ 1913 Webster ]

v. i. To circumgyrate. [ Obs. ] [ 1913 Webster ]

a. [ Dextro- + gyrate. ] (Chem. & Opt.) Same as Dextrorotatory. [ 1913 Webster ]

‖pos>n. [ NL., fr. Gr. &unr_; out, outside + &unr_; circle. ] (Paleon.) A genus of Cretaceous fossil shells allied to oysters. [ 1913 Webster ]

‖n. [ NL., fr. Gr. gyro`s round + 'a`kanqa spine. ] (Paleon.) A genus of fossil fishes, found in Devonian and carboniferous strata; -- so named from their round, sculptured spines. [ 1913 Webster ]

a. [ See Gyre. ] 1. Moving in a circular path or way; whirling; gyratory. [ 1913 Webster ]

2. (Anat.) Pertaining to a gyrus, or convolution. [ 1913 Webster ]

a. Gyrating. [ R. ] [ 1913 Webster ]

a. [ L. gyratus made in a circular form, p. p. of gyrare. ] Winding or coiled round; curved into a circle; taking a circular course. [ 1913 Webster ]

v. i. [ imp. & p. p. Gyrated p. pr. & vb. n. Gyrating. ] [ L. gyratus, p. p. of gyrare to gyrate. See Gyre, n. ] To revolve round a central point; to move spirally about an axis, as a tornado; to revolve. [ 1913 Webster ]

n. 1. The act of turning or whirling, as around a fixed center; a circular or spiral motion; motion about an axis; rotation; revolution. [ 1913 Webster ]

The gyrations of an ascending balloon. De Quincey. [ 1913 Webster ]

If a burning coal be nimbly moved round in a circle, with gyrations continually repeated, the whole circle will appear like fire. Sir I. Newton. [ 1913 Webster ]

2. (Zool.) One of the whorls of a spiral univalve shell. [ 1913 Webster ]

Center of gyration. (Mech.) See under Center. --
Radius of gyration, the distance between the axis of a rotating body and its center of gyration. Rankine. [ 1913 Webster ]

a. Moving in a circle, or spirally; revolving; whirling around. [ 1913 Webster ]

n. [ L. gyrus, Gr. gy^ros, cf. gyro`s round. ] A circular motion, or a circle described by a moving body; a turn or revolution; a circuit. [ 1913 Webster ]

Quick and more quick he spins in giddy gyres. Dryden. [ 1913 Webster ]

Still expanding and ascending gyres. Mrs. Browning. [ 1913 Webster ]

v. t. & i. [ Cf. OF. gyrer, girer. See Gyrate. ] To turn round; to gyrate. [ Obs. ] Bp. Hall. Drayton. [ 1913 Webster ]

a. Abounding in gyres. [ Obs. ] [ 1913 Webster ]

‖n. pl. [ NL. fr. Gr. gyro`s round + 'egke`falos the brain. ] (Zool.) The higher orders of Mammalia, in which the cerebrum is convoluted. -- Gyr`en*ceph"a*lous a. [1913 Webster]

n. [ OE. gerfaucon, OF. gerfaucon, LL. gyrofalco, perh. fr. L. gyrus circle + falco falcon, and named from its circling flight; or cf. E. gier-eagle. See Gyre, n., Falcon. ] (Zool.) One of several species and varieties of large Arctic falcons, esp. Falco rusticolus and the white species Falco Islandicus, both of which are circumpolar. The black and the gray are varieties of the former. See Illust. of Accipiter. [ Written also gerfalcon, gierfalcon, and jerfalcon. ] [ 1913 Webster ]

‖n. pl. See Gyrus. [ 1913 Webster ]

v. t. [ See Garland. ] To garland. [ Obs. ] [ 1913 Webster ]

Their hair loose and flowing, gyrlanded with sea grass. B. Jonson.

‖n. [ NL., fr. Gr. gyro`s round + 'odoy`s tooth. ] (Paleon.) A genus of extinct oölitic fishes, having rounded teeth in several rows adapted for crushing. [ 1913 Webster ]

n. [ Gr. gy^ros circle, ring + go`nos fruit. ] (Paleon.) The petrified fruit of the Chara hispida, a species of stonewort. See Stonewort. Lyell. [ 1913 Webster ]

a. [ Gr. gy^ros circle + -oid + -al. ] 1. Spiral in arrangement or action. [ 1913 Webster ]

2. (Crystallog.) Having the planes arranged spirally, so that they incline all to the right (or left) of a vertical line; -- said of certain hemihedral forms. [ 1913 Webster ]

3. (Opt.) Turning the plane of polarization circularly or spirally to the right or left. [ 1913 Webster ]

‖n. [ NL., fr. Gr. gyro`s round + lepi`s scale. ] (Paleon.) A genus of ganoid fishes, found in strata of the new red sandstone, and the lias bone beds. Agassiz. [ 1913 Webster ]

‖n. [ NL., fr. Gr. gyroy^n to round, bend, fr. gyro`s round. ] A turning round. [ R. ] [ 1913 Webster ]

n. [ Gr. gy^ros ring, circle + -mancy: cf. F. gyromancie. ] A kind of divination performed by drawing a ring or circle, and walking in or around it. Brande & C. [ 1913 Webster ]

n. [ F. giron; of German origin. See Gore a piece of cloth. ] (Her.) A subordinary of triangular form having one of its angles at the fess point and the opposite side at the edge of the escutcheon. When there is only one gyron on the shield it is bounded by two lines drawn from the fess point, one horizontally to the dexter side, and one to the dexter chief corner. [ 1913 Webster ]

a. [ F. gironné. ] (Her.) Covered with gyrons, or divided so as to form several gyrons; -- said of an escutcheon. [ 1913 Webster ]

n. [ L. gyrare to revolve + E. pigeon. ] A flying object simulating a pigeon in flight, when projected from a spring trap. It is used as a flying target in shooting matches. Knight. [ 1913 Webster ]

n. [ Gr. gy^ros ring, circle + -scope. ] 1. A rotating wheel, mounted in a ring or rings, for illustrating the dynamics of rotating bodies, the composition of rotations, etc. It was devised by Professor W. R. Johnson, in 1832, by whom it was called the rotascope. [ 1913 Webster ]

2. A form of the above apparatus, invented by M. Foucault, mounted so delicately as to render visible the rotation of the earth, through the tendency of the rotating wheel to preserve a constant plane of rotation, independently of the earth's motion. [ 1913 Webster ]

a. Pertaining to the gyroscope; resembling the motion of the gyroscope. [ 1913 Webster ]

a. [ See Gyre. ] (Bot.) Turned round like a crook, or bent to and fro. Loudon. [ 1913 Webster ]

n. [ Gr. gy^ros ring, circle + "ista`nai to cause to stand.] (Physics) A modification of the gyroscope, consisting essentially of a fly wheel fixed inside a rigid case to which is attached a thin flange of metal for supporting the instrument. It is used in studying the dynamics of rotating bodies. [1913 Webster]

a. (Physics) Of or pertaining to the gyrostat or to gyrostatics. [ 1913 Webster ]

n. (Physics) The doctrine or theory of the gyrostat, or of the phenomena of rotating bodies. [ 1913 Webster ]

‖n.; pl. Gyri [ L. See Gyre, n. ] A convoluted ridge between grooves; a convolution; as, the gyri of the brain; the gyri of brain coral. See Brain. [ 1913 Webster ]

a. Of or pertaining to mercury; containing, or impregnated with, mercury. [ R. ] [ 1913 Webster ]

n. (Med.) A diseased condition produced by poisoning with hydrargyrum, or mercury; mercurialism. [ 1913 Webster ]

n. [ NL., fr. L. hydrargyrus, Gr. "ydra`rgyros; "y`dwr water + 'a`rgyros silver. ] (Chem.) Quicksilver; mercury. [ 1913 Webster ]

n. See Cerargyrite. [ 1913 Webster ]

a. [ Levo- + gyrate. ] (Chem., Physics, Biochem.) Turning or twisting the plane of polarization of light towards the left, as levulose, levotartaric acid, etc.; levorotatory. [ Written also lævogyrate. ] [ 1913 Webster ]

‖n. [ NL. See Litharge. ] (Old Chem.) Crystallized litharge, obtained by fusion in the form of fine yellow scales. [ 1913 Webster ]

n. [ Gr. &unr_; less + &unr_; silver. So called because it contains less silver than some kindred ore. ] (Min.) A mineral of an iron-black color, and very sectile, consisting principally of sulphur, antimony, and silver. [ 1913 Webster ]

n. [ L. panegyricus, Gr. panhgyriko`s: cf. F. panégyrique. See Panegyric, a. ] An oration or eulogy in praise of some person or achievement; a formal or elaborate encomium; a laudatory discourse; laudation. See Synonym of Eulogy. [ 1913 Webster ]