Trimming joist(Arch.), a joist into which timber trimmers are framed; a header. See Header. Knight.

(Trim"ming), n.

1. The act of one who trims.

Trimerous to Trip

(Tri"mer*ous) a. [See Trimera.] (Bot.) Having the parts in threes.

(Tri`me*sit"ic) a. [Pref. tri- + mesitylene + -ic.] (Chem.) Of, pertaining to, or designating, a tribasic acid, C6H3.(CO2)3, of the aromatic series, obtained, by the oxidation of mesitylene, as a white crystalline substance. [Written also trimesic.]

(Tri*mes"ter) n. [L. trimestris of three months; tri- (see Tri-) + mensis month: cf. F. trimestre.] A term or period of three months.

(Tri*mes"tral) a. Trimestrial. Southey.

(Tri*mes"tri*al) a. Of or pertaining to a trimester, or period of three months; occurring once in every three months; quarterly.

(Trim"e*ter) a. [L. trimetrus, Gr. (see Tri-) + measure. See Meter measure.] (Pros.) Consisting of three poetical measures.n. A poetical division of verse, consisting of three measures. Lowth.

(Tri*meth"yl) (Chem.) A prefix or combining form (also used adjectively) indicating the presence of three methyl groups.

(Tri*meth`yl*am"ine) n. [Trimethyl- + amine.] (Chem.) A colorless volatile alkaline liquid, N.(CH3)3, obtained from herring brine, beet roots, etc., with a characteristic herringlike odor. It is regarded as a substituted ammonia containing three methyl groups.

(Tri*meth"yl*ene) n. (Chem.) A gaseous hydrocarbon, C3H6, isomeric with propylene and obtained from it indirectly. It is the base of a series of compounds analogous to the aromatic hydrocarbons.

(Tri*met"ric) a. [Pref. tri- + Gr. measure.] (Crystallog.) Same as Orthorhombic.

(Tri*met"ric*al) a. Same as Trimeter.

(Trim"ly) adv. In a trim manner; nicely.

(Trim"mer) n.

1. One who trims, arranges, fits, or ornaments.

2. One who does not adopt extreme opinions in politics, or the like; one who fluctuates between parties, so as to appear to favor each; a timeserver.

Thus Halifax was a trimmer on principle.

3. An instrument with which trimming is done.

4. (Arch.) A beam, into which are framed the ends of headers in floor framing, as when a hole is to be left for stairs, or to avoid bringing joists near chimneys, and the like. See Illust. of Header.

(Trim"ming) a. from Trim, v.

The Whigs are, essentially, an inefficient, trimming, halfway sort of a party.

  By PanEris using Melati.

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