| Tris | <abbreviation, chemical> Tris(hydroxymethyl)aminomethane and tris(hydroxymethyl)methylamine; used as a trivial name. (05 Mar 2000) |
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| tris(hydroxymethyl)aminomethane | <chemical> An organic amine proton acceptor. It is used in the synthesis of surface-active agent and pharmaceuticals; as an emulsifying agent for cosmetic creams and lotions, mineral oil and paraffin wax emulsions, is a biological buffer, and is used as an alkaliser. Pharmacological action: buffers, excipient. Chemical name: 1,3-Propanediol, 2-amino-2-(hydroxymethyl)- (12 Dec 1998) |
| tris(hydroxymethyl)methylamine | <chemical> An organic amine proton acceptor. It is used in the synthesis of surface-active agent and pharmaceuticals; as an emulsifying agent for cosmetic creams and lotions, mineral oil and paraffin wax emulsions, is a biological buffer, and is used as an alkaliser. Pharmacological action: buffers, excipient. Chemical name: 1,3-Propanediol, 2-amino-2-(hydroxymethyl)- (12 Dec 1998) |
| tris- | <prefix> A chemical prefix indicating three of the substituents that follow, independently linked. Compare: tri-. (05 Mar 2000) |
| trisaccharide | A carbohydrate containing three monosaccharide residues, e.g., raffinose. (05 Mar 2000) |
| trisaccharides | Any of a class of carbohydrates composed of three glycosidically linked monosaccharide groups. (12 Dec 1998) |
| trisacramentarian | One who recognizes three sacraments, and no more; namely, baptism, the Lord's Supper, and penance. See Sacrament. Origin: Pref. Tri- + sacramentarian. Source: Websters Dictionary (01 Mar 1998) |
| trisagion | An ancient anthem, usually known by its Latin name tersanctus.See Tersanctus. Origin: NL, fr. Gr. Thrice holy; thrice + holy. Source: Websters Dictionary (01 Mar 1998) |
| trisect | 1. To cut or divide into three parts. 2. <geometry> To cut or divide into three equal parts. Origin: Pref. Tri- + L. Sectus, p. P. Of secare to cut. See Section. Source: Websters Dictionary (01 Mar 1998) |
| trisected | <botany> Divided into three parts or segments by incisions extending to the midrib or to the base; said of leaves. Source: Websters Dictionary (01 Mar 1998) |
| trisection | <geometry> The division of a thing into three parts, Specifically: the division of an angle into three equal parts. Origin: Cf. F. Trisection. Source: Websters Dictionary (01 Mar 1998) |
| triseralous | <botany> Having three sepals, or calyx leaves. Origin: Pref. Tri- + sepal. Source: Websters Dictionary (01 Mar 1998) |
| triseriate | <botany> Arranged in three vertical or spiral rows. Origin: Pref. Tri- + serial, seriate. Source: Websters Dictionary (01 Mar 1998) |
| triskaidekaphobia | <psychology> Superstitious dread of the number thirteen. Origin: G. Triskaideka, thirteen, + phobos, fear (05 Mar 2000) |
| triskelion | <protein> A three legged structure assumed by clathrin isolated from coated vesicles. A trimer of clathrin (180 kD) with three light chains is probably the physiological sub unit of clathrin coats in coated vesicles. (18 Nov 1997) |