Chapter O to Obdurate of O by Webster's Dictionary (1913 Edition)

Green oak

, oak wood colored green by the growth of the mycelium of certain fungi. — Oak apple, a large, smooth, round gall produced on the leaves of the American red oak by a gallfly (Cynips confluens). It is green and pulpy when young. — Oak beauty (Zoöl.), a British geometrid moth (Biston prodromaria) whose larva feeds on the oak. — Oak gall, a gall found on the oak. See 2d Gall. — Oak leather (Bot.), the mycelium of a fungus which forms leatherlike patches in the fissures of oak wood. — Oak pruner. (Zoöl.) See Pruner, the insect. — Oak spangle, a kind of gall produced on the oak by the insect Diplolepis lenticularis. — Oak wart, a wartlike gall on the twigs of an oak. — The Oaks, one of the three great annual English horse races It was instituted in 1779 by the Earl of Derby, and so called from his estate. — To sport one's oak, to be "not at home to visitors," signified by closing the outer (oaken) door of one's rooms. [Cant, Eng. Univ.]

Oaken
(Oak"en) a. [AS. acen.] Made or consisting of oaks or of the wood of oaks. "In oaken bower." Milton.

Oaken timber, wherewith to build ships.

Bacon.

Oaker
(Oak"er) n. See Ocher. [Obs.] Spenser.

Oakling
(Oak"ling) n. A young oak. Evelyn.

Oakum
(Oak"um) n. [AS. acumba; pref. (cf.G. er-, Goth. us-, orig. meaning, out) + cemban to comb, camb comb. See Comb.]

1. The material obtained by untwisting and picking into loose fiber old hemp ropes; — used for calking the seams of ships, stopping leaks, etc.

2. The coarse portion separated from flax or hemp in nackling. Knight.

White oakum, that made from untarred rope.

Oaky
(Oak"y) n. Resembling oak; strong. Bp. Hall.

Oar
(Oar) n [AS. ar; akin to Icel. ar, Dan. aare, Sw. åra; perh. akin to E. row, v. Cf. Rowlock.]

1. An implement for impelling a boat, being a slender piece of timber, usually ash or spruce, with a grip or handle at one end and a broad blade at the other. The part which rests in the rowlock is called the loom.

An oar is a kind of long paddle, which swings about a kind of fulcrum, called a rowlock, fixed to the side of the boat.

2. An oarsman; a rower; as, he is a good oar.

3. (Zoöl.) An oarlike swimming organ of various invertebrates.

Oar cock (Zoöl), the water rail. [Prov. Eng.] — Spoon oar, an oar having the blade so curved as to afford a better hold upon the water in rowing. — To boat the oars, to cease rowing, and lay the oars in the boat. — To feather the oars. See under Feather., v. t. — To lie on the oars, to cease pulling, raising the oars out of water, but not boating them; to cease from work of any kind; to be idle; to rest. — To muffle the oars, to put something round that part which rests in the rowlock, to prevent noise in rowing. — To put in one's oar, to give aid or advice; — commonly used of a person who obtrudes aid or counsel not invited. — To ship the oars, to place them in the rowlocks. — To toss the oars, To peak the oars, to lift them from the rowlocks and hold them perpendicularly, the handle resting on the bottom of the boat. - - To trail oars, to allow them to trail in the water alongside of the boat. — To unship the oars, to take them out of the rowlocks.