2. (Poetry) A triplet; a group of three lines.

Ter"cine (?), n. [F., from L. tertius the third.] (Bot.) A cellular

layer derived from the nucleus of an ovule and surrounding the embryo

sac. Cf. Quintine.

Ter"e*bate (?), n. A salt of terebic acid.

Ter"e*bene (?), n. (Chem.) A polymeric modification of terpene,

obtained as a white crystalline camphorlike substance; — called also

camphene. By extension, any one of a group of related substances.

<! p. 1487 !>

Ter`e*ben"thene (?), n. (Chem.) Oil of turpentine. See Turpentine.

Te*reb"ic (?), a. (Chem.) Pertaining to, or obtained from, terbenthene

(oil of turpentine); specifically, designating an acid, C7H10O4,

obtained by the oxidation of terbenthene with nitric acid, as a white

crystalline substance.

Ter`e*bi*len"ic (?), a. (Chem.) Of, pertaining to, or designating, a

complex acid, C7H8O4, obtained as a white crystalline substance by a

modified oxidation of terebic acid.

Ter"e*binth (?), n. [L. terbinthus, Gr. &?;: cf. F. térébinthe. Cf.

Turpentine.] (Bot.) The turpentine tree.

Ter`e*bin"thic (?), a. (Chem.) Of or pertaining to turpentine;

resembling turpentine; terbinthine; as, terbinthic qualities.

Ter`e*bin"thi*nate (?), a. Impregnating with the qualities of

turpentine; terbinthine.

Ter`e*bin"thine (?), a. [L. terbinthinus, Gr. &?;.] Of or pertaining to

turpentine; consisting of turpentine, or partaking of its qualities.

||Ter"e*bra (?), n.; pl. E. Terebras (#), L. Terebræ (#). [L., a

||borer.] 1. (Zoöl.) A genus of marine gastropods having a long,

||tapering spire. They belong to the Toxoglossa. Called also auger

||shell.

||

2. (Zoöl.) The boring ovipositor of a hymenopterous insect.

Ter"e*brant (?), a. [L. terebrans, -antis, p. pr.] (Zoöl.) Boring, or

adapted for boring; — said of certain Hymenoptera, as the sawflies.

||Ter`e*bran"ti*a (?), n. pl. [NL.] (Zoöl.) A division of Hymenoptera

||including those which have an ovipositor adapted for perforating

||plants. It includes the sawflies.

||

Ter"e*brate (?), v. t. [L. terebratus, p. p. of terebrare, from terebra

a borer, terere to rub.] To perforate; to bore; to pierce. [R.] Sir T.

Browne.

Ter"e*bra`ting (?), a. 1. (Zoöl.) Boring; perforating; — applied to

molluskas which form holes in rocks, wood, etc.

2. (Med.) Boring; piercing; — applied to certain kinds of pain,

especially to those of locomotor ataxia.

Ter`e*bra"tion (?), n. [L. terebratio.] The act of terebrating, or

boring. [R.] Bacon.

||Ter`e*brat"u*la (?), n.; pl. Terebratulæ (#). [Nl., dim. fr.

||terebratus, p. p., perforated.] (Zoöl.) A genus of brachiopods which

||includes many living and some fossil species. The larger valve has a

||perforated beak, through which projects a short peduncle for

||attachment. Called also lamp shell.

||

Ter`e*brat"u*lid (?), n. (Zoöl.) Any species of Terebratula or allied

genera. Used also adjectively.

Ter`e*bra*tu"li*form (?), a. (Zoöl.) Having the general form of a

terebratula shell.

Ter"e*dine (?), n. [F. térédine.] (Zoöl.) A borer; the teredo.

Te*re"do (?), n.; pl. E. Teredos (#), L. Teredines (#). [L., a worm

that gnaws wood, clothes, etc.; akin to Gr. &?;, L. terere to rub.]

(Zoöl.) A genus of long, slender, wormlike bivalve mollusks which bore

into submerged wood, such as the piles of wharves, bottoms of ships,

etc.; — called also shipworm. See Shipworm. See Illust. in App.

Ter*eph"tha*late (?), n. (Chem.) A salt of terephthalic acid.

Ter`eph*thal"ic (?), a. [Terebene + phthalic.] (Chem.) Of, pertaining

to, or designating, a dibasic acid of the aromatic series, metameric

with phthalic acid, and obtained, as a tasteless white crystalline

powder, by the oxidation of oil of turpentine; — called also

paraphthalic acid. Cf. Phthalic.

Ter"et (?), a. Round; terete. [Obs.] Fotherby.

Te*rete" (?), a. [L. teres, - etis, rounded off, properly, rubbed off,

fr. terere to rub.] Cylindrical and slightly tapering; columnar, as

some stems of plants.

Te*re"tial (?), a. [See Terete.] (Anat.) Rounded; as, the teretial

tracts in the floor of the fourth ventricle of the brain of some

fishes. Owen.

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