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- English Word Xiphisternum Definition The posterior segment, or extremity, of the sternum; -- sometimes called metasternum, ensiform cartilage, ensiform process, or xiphoid process.
- English Word Xiphisternum Definition The xiphiplastron.
- English Word Xiphius Definition A genus of cetaceans having a long, pointed, bony beak, usually two tusklike teeth in the lower jaw, but no teeth in the upper jaw.
- English Word Xiphodon Definition An extinct genus of artiodactylous mammals found in the European Tertiary formations. It had slender legs, didactylous feet, and small canine teeth.
- English Word Xiphoid Definition Like a sword; ensiform.
- English Word Xiphoid Definition Of or pertaining to the xiphoid process; xiphoidian.
- English Word Xiphoidian Definition Xiphoid.
- English Word Xiphophyllous Definition Having sword-shaped leaves.
- English Word Xiphosura Definition See Xiphura.
- English Word Xiphura Definition Same as Limuloidea. Called also Xiphosura.
- English Word Xylamide Definition An acid amide derivative of xylic acid, obtained as a white crystalline substance.
- English Word Xylanthrax Definition Wood coal, or charcoal; -- so called in distinction from mineral coal.
- English Word Xylate Definition A salt of xylic acid.
- English Word Xylem Definition That portion of a fibrovascular bundle which has developed, or will develop, into wood cells; -- distinguished from phloem.
- English Word Xylene Definition Any of a group of three metameric hydrocarbons of the aromatic series, found in coal and wood tar, and so named because found in crude wood spirit. They are colorless, oily, inflammable liquids, C6H4.(CH3)2, being dimethyl benzenes, and are called respectively orthoxylene, metaxylene, and paraxylene. Called also xylol.
- English Word Xylenol Definition Any one of six metameric phenol derivatives of xylene, obtained as crystalline substances, (CH3)2.C6H3.OH.
- English Word Xyletic Definition Pertaining to, or designating, a complex acid related to mesitylenic acid, obtained as a white crystalline substance by the action of sodium and carbon dioxide on crude xylenol.
- English Word Xylic Definition Pertaining to, derived from, or related to, xylene; specifically, designating any one of several metameric acids produced by the partial oxidation of mesitylene and pseudo-cumene.
- English Word Xylidic Definition Pertaining to, or designating, either one of two distinct acids which are derived from xylic acid and related compounds, and are metameric with uvitic acid.
- English Word Xylidine Definition Any one of six metameric hydrocarbons, (CH3)2.C6H3.NH2, resembling aniline, and related to xylene. They are liquids, or easily fusible crystalline substances, of which three are derived from metaxylene, two from orthoxylene, and one from paraxylene. They are called the amido xylenes.