Xylocopa noun [ New Latin , from Greek ... cutting wood; xy`lon wood + ... to cut.] (Zoology) A genus of hymenopterous insects including the carpenter. See Carpenter bee , under Carpenter . -- Xy*loc"o*pine adjective

Xylogen noun [ Xylo- + - gen .] (a) (Botany) Nascent wood; wood cells in a forming state. (b) Lignin.

Xylograph noun [ Xylo- + - graph .] An engraving on wood, or the impression from such an engraving; a print by xylography.

Xylographer noun One who practices xylography.

Xylographic, Xylographical adjective [ Confer French xylographique .] Of or pertaining to xylography, or wood engraving.

Xylography noun [ Xylo- + -graphy : confer French xylographie .]

1. The art of engraving on wood.

2. The art of making prints from the natural grain of wood. Knight.

3. A method pf printing in colors upon wood for purposes of house decoration. Ure.

Xyloid adjective [ Xyl o- + - oid .] Resembling wood; having the nature of wood.

Xyloidin noun [ Xyl o- + - oid .] (Chemistry) A substance resembling pyroxylin, obtained by the action of nitric acid on starch; -- called also nitramidin .

Xylol noun [ Xyl o- + Latin ol eum oil.] (Chemistry) Same as Xylene .

Xylology noun [ Prefix xylo- + -logy .] The branch of dendrology treating of the gross and minute structure of wood.

Xylonite noun See Zylonite .

Xylophaga noun [ New Latin See Xylophagous .] (Zoology) A genus of marine bivalves which bore holes in wood. They are allied to Pholas.

Xylophagan noun [ See Xylophagous .] (Zoology) (a) One of a tribe of beetles whose larvæ bore or live in wood. (b) Any species of Xylophaga. (c) Any one of the Xylophagides.

Xylophagides noun plural [ See Xylophagous .] (Zoology) A tribe or family of dipterous flies whose larvæ live in decayed wood. Some of the tropical species are very large.

Xylophagous adjective [ Greek ... eating wood; xy`lon wood + ... to eat.] (Zoology) (a) Eating, boring in, or destroying, wood; -- said especially of certain insect larvæ, crustaceans, and mollusks. (b) Of or pertaining to the genus Xylophaga.

Xylophilan noun [ See Xylophilous .] (Zoology) One of a tribe of beetles ( Xylophili ) whose larvæ live on decayed wood.

Xylophilous adjective [ Xylo- + Greek filei^n to love.] (Zoology) Of or pertaining to the xylophilans.

Xylophone noun [ Xylo- + Greek fwnh` sound.]

1. (Mus.) An instrument common among the Russians, Poles, and Tartars, consisting of a series of strips of wood or glass graduated in length to the musical scale, resting on belts of straw, and struck with two small hammers. Called in Germany strohfiedel , or straw fiddle .

2. An instrument to determine the vibrative properties of different kinds of wood. Knight.

Xyloplastic adjective [ Xylo- + -plastic .] (Technol.) Formed of wood pulp by molds; relating to casts made of wood pulp in molds.

Xylopyrography noun [ Xylo- + Greek ..., ..., fire + -graphy .] The art or practice of burning pictures on wood with a hot iron; -- called also poker painting . See Poker picture , under Poker .

Xyloquinone noun [ Xyl ene + quinone .] (Chemistry) Any one of a group of quinone compounds obtained respectively by the oxidation of certain xylidine compounds. In general they are yellow crystalline substances.

Xylorcin noun [ Xyl ene + orcin .] (Chemistry) A derivative of xylene obtained as a white crystalline substance which on exposure in the air becomes red; -- called also betaorcin .

Xylose noun [ Prefix xylo- + -ose .] (Chemistry) An unfermentable sugar of the pentose class, C ₅ H ₁₀ O ₅ , formed by the hydrolysis of xylan; wood sugar.

Xylostein noun [ Xylo- + Greek ... bone.] (Chemistry) A glucoside found in the poisonous berries of a species of honeysuckle ( Lonicera xylosteum ), and extracted as a bitter, white, crystalline substance.

Xylotile noun Same as Parkesine .

Xylotomist noun One versed or engaged in xylotomy.

Xylotomous adjective [ Prefix xylo- + root of Greek ... to cut.] (Zoology) Capable of boring or cutting wood; -- said of many insects.

Xylotomy noun [ Prefix xylo- + -tomy .] Art of preparing sections (transverse, tangential, or radial) of wood, esp. by means of a microtome, for microscopic examination.

Xylotrya noun [ New Latin , from Greek xy`lon wood + ... to rub, wear out.] (Zoology) A genus of marine bivalves closely allied to Teredo, and equally destructive to timber. One species ( Xylotrya fimbriata ) is very common on the Atlantic coast of the United States.

Xylyl noun [ Xylo- + - yl .] (Chemistry) Any one of three metameric radicals which are characteristic respectively of the three xylenes.

Xylylene noun (Chemistry) Any one of three metameric radicals, CH ₂ .C ₆ H ₄ .CH ₂ , derived respectively from the three xylenes. Often used adjectively; as, xylylene alcohol.

Xyridaceous adjective (Botany) Of or pertaining to a natural order ( Xyrideæ ) of endogenous plants, of which Xyris is the type.

Xyris noun [ Latin , a kind of Iris, Greek ..., from ... a razor.] (Botany) A genus of endogenous herbs with grassy leaves and small yellow flowers in short, scaly- bracted spikes; yellow-eyed grass. There are about seventeen species in the Atlantic United States.

Xyst Xys"tus noun [ Latin xystus , Greek ..., from ... to scrape, polish; -- so called from its smooth and polished floor.] (Anc. Arch.) A long and open portico, for athletic exercises, as wrestling, running, etc., for use in winter or in stormy weather.

Xystarch noun [ Latin xystarches , Greek ..., ... a xyst + ... to rule.] (Gr. Antiq.) An office... having the superintendence of the xyst. Dr. W. Smith.

Xyster noun [ New Latin , from Greek xysth`r a scraper.] (Surg.) An instrument for scraping bones.