Chapter Jailer to Jar of J by Webster's Dictionary (1913 Edition)

3. (Naut.) To bring (a vessel) so close to the wind that half her upper sails are laid aback. W. C. Russell.

Jam
(Jam), n.

1. A mass of people or objects crowded together; also, the pressure from a crowd; a crush; as, a jam in a street; a jam of logs in a river.

2. An injury caused by jamming. [Colloq.]

Jam
(Jam), n. [Prob. fr. jam, v.; but cf. also Ar. jamad ice, jelly, jamid congealed, jamd congelation, ice.] A preserve of fruit boiled with sugar and water; as, raspberry jam; currant jam; grape jam.

Jam nut. See Check nut, under Check. — Jam weld (Forging), a butt weld. See under Butt.

Jamacina
(||Jam`a*ci"na) n. [NL.] Jamaicine.

Jamadar
(||Jam"a*dar) n. Same as Jemidar.

Jamaica
(Ja*mai"ca) n. One of the West India islands.

Jamaica ginger, a variety of ginger, called also white ginger, prepared in Jamaica from the best roots, which are deprived of their epidermis and dried separately. — Jamaica pepper, allspice. — Jamaica rose (Bot.), a West Indian melastomaceous shrub with showy pink flowers.

Jamaican
(Ja*mai"can) a. Of or pertaining to Jamaica. — n. A native or inhabitant of Jamaica.

Jamaicine
(Ja*ma"i*cine) n. [From Jamaica.] (Chem.) An alkaloid said to be contained in the bark of Geoffroya inermis, a leguminous tree growing in Jamaica and Surinam; — called also jamacina. Watts.

Jamb
(Jamb) n. [Prov. E. jaumb, jaum, F. jambe a leg, jambe de force a principal rafter. See Gambol.]

1. (Arch) The vertical side of any opening, as a door or fireplace; hence, less properly, any narrow vertical surface of wall, as the of a chimney-breast or of a pier, as distinguished from its face. Gwilt.

2. (Mining) Any thick mass of rock which prevents miners from following the lode or vein.

Jamb
(Jamb) v. t. See Jam, v. t.

Jambee
(Jam*bee") n. [See Jamb, n.: cf. OF. jamboier to walk.] A fashionable cane. [Obs.] Tatler.

Jambes
(Jambes Jam"beux) n. pl. [From F. jambe a leg: cf. OF. jambiere. See Jamb, n.] (Ancient Armor) In the Middle Ages, armor for the legs below the knees. [Written also giambeux.] Chaucer.

Jambolana
(||Jam`bo*la"na) n. [Cf. Pg. jambolão a kind of tropical fruit.] (Bot.) A myrtaceous tree of the West Indies and tropical America with astringent bark, used for dyeing. It bears an edible fruit.

Jamdani
(||Jam"da*ni) n. A silk fabric, with a woven pattern of sprigs of flowers. [Written also jamdanee.] Balfour

Jamesonite
(Ja"me*son*ite) n. [From Prof. Jameson, of Edinburgh.] (Min.) A steel-gray mineral, of metallic luster, commonly fibrous massive. It is a sulphide of antimony and lead, with a little iron.

James's powder
(James"'s pow`der) (Med.) Antimonial powder, first prepared by Dr. James, an English physician; — called also fever powder.