Webster's Dictionary 1913

1729

Oryctologist

Or′yc‐tol″o‐gist (?), n. One versed in oryctology.

1730

Oryctology

Or′yc‐tol″o‐gy (?), n. [Gr. ορυκτὄσ dug + -logy: cf. F. oryctologie.] 1. An old name for paleontology.2. An old name for mineralogy and geology.

1731

Oryx

O″ryx (ō″rĭks), prop. n. [NL., from Gr. ὄρυξ a kind of gazelle or antelope.] (Zoöl.) A genus of African antelopes which includes the gemsbok, the leucoryx, the bisa antelope (O....

1732

Oryza

‖O‐ry″za (?), n. [L., rice, Gr. � See Rice.] (Bot.) A genus of grasses including the rice plant; rice.

1733

Os

‖Os (?), n.; pl.Ossa (#). A bone.

1734

Os (2)

‖Os, n.; pl.Ora (#). A mouth; an opening; an entrance.

1735

Os (3)

Os (?), n.; pl.Osar (#). [Sw. ås ridge, chain of hills, pl. åsar.] (Geol.) One of the ridges of sand or gravel found in Sweden, etc., supposed by some to be of marine origin, bu...

1736

Osage orange

O″sage or″ange (?). (Bot.) An ornamental tree of the genus Maclura (M. aurantiaca), closely allied to the mulberry (Morus); also, its fruit. The tree was first found in the coun...

1737

Osages

O‐sa″ges (?), n. pl.; sing. Osage (�). (Ethnol.) A tribe of southern Sioux Indians, now living in the Indian Territory.

1738

Osanne

O‐san″ne (?), n. Hosanna. Chaucer.

1739

Osar

O″sar (?), n. pl.(Geol.) See 3d Os.

1740

Oscan

Os″can (?), a. Of or pertaining to the Osci, a primitive people of Campania, a province of ancient Italy. — n. The language of the Osci.

1741

Oscillancy

Os″cil‐lan‐cy (?), n. The state of oscillating; a seesaw kind of motion.

1742

Oscillaria

‖Os′cil‐la″ri‐a (?), n. [NL., fr. L. oscillare to swing.] (Bot.) A genus of dark green, or purplish black, filamentous, fresh-water algæ, the threads of which have an automatic ...

1743

Oscillate

Os″cil‐late (–lāt), v. i. [imp. & p. p.Oscillated (?); p. pr. & vb. n.Oscillating (?).] [L. oscillare to swing, fr. oscillum a swing, a little mask or puppet made to be hung fro...

1744

Oscillating

Os″cil‐la′ting (ŏs″sĭl‐lā′tĭng), a. That oscillates; vibrating; swinging.Oscillating engine, a steam engine whose cylinder oscillates on trunnions instead of being permanently f...

1745

Oscillating current

Os″cil‐lat′ing current. (Elec.) A current alternating in direction.

1746

Oscillation

Os′cil‐la″tion (?), n. [L. oscillatio a swinging.]1. The act of oscillating; a swinging or moving backward and forward, like a pendulum; vibration.2. Fluctuation; variation; cha...

1747

Oscillative

Os″cil‐la‐tive (?), a. Tending to oscillate; vibratory. I. Taylor.

1748

Oscillator

Os″cil‐la′tor (?), n. One that oscillates; specif.: (a) (Elec.) Any device for producing electric oscillations; esp., an apparatus for generating electric waves in a system of w...

1749

Oscillatoria

‖Os′cil‐la‐to″ri‐a (?), n. pl. [NL. See Oscillatory.] (Bot.) Same as Oscillaria.

1750

Oscillatory

Os″cil‐la‐to‐ry (?), a. [Cf. F. oscillatoire. See Oscillate.] Moving, or characterized by motion, backward and forward like a pendulum; swinging; oscillating; vibratory; as, osc...

1751

Oscillogram

Os″cil‐lo‐gram (?), n. [L. oscillare + -gram.] (Elec.) An autographic record made by an oscillograph.

1752

Oscillograph

Os″cil‐lo‐graph (?), n. [L. oscillare to swing + -graph.] (Elec.) An apparatus for recording or indicating alternating-current wave forms or other electrical oscillations, usual...

1753

Oscillometer

Os′cil‐lom″e‐ter (?), n. [L. oscillare to swing + -meter.] An instrument for measuring the angle through which a ship rolls or pitches at sea.

1754

Oscilloscope

Os‐cil″lo‐scope (?), n. [L. oscillare to swing + -scope.] (Elec.) An instrument for showing visually the changes in a varying current; an oscillograph.

1755

Oscine

Os″cine (?), a.(Zoöl.) Relating to the Oscines.