Yox (?), v. i. See Yex. [Obs.] Chaucer.
Y*pight" (?), obs. p. p. of Pitch. See Pight.
Yp"o*cras (?), n. Hippocras. [Obs.] Chaucer.
Y"pres lace` (?). Fine bobbin lace made at Ypres in Belgium, usually exactly like Valenciennes lace.
Yp*sil"i*form (?), a. [Gr. &?; &?; the name of the letter &?; + -form.] (Biol.) Resembling the &?; in appearance; -- said of the germinal spot in the ripe egg at one of the stages of fecundation.
Yp"si*loid (?), a. (Anat.) In the form of the letter Y; Y-shaped.
Y*raft" (?), obs. p. p. of Reave. Bereft. Chaucer.
Yr"en (?), n. Iron. [Obs.] Chaucer.
Y*ron"ne (?), obs. p. p. of Run. Run. Chaucer.
Y*same" (?), adv. [See Same.] Together. [Obs.] "And in a bag all sorts of seeds ysame." Spenser.
{ Yt, Yt (t) }, an old method of printing that (AS. þæt, ðæt) the "y" taking the place of the old letter "thorn" (þ). Cf. Ye, the.
Y*throwe" (?), obs. p. p. of Throw. Chaucer.
Yt*ter"bic (?), a. (Chem.) Pertaining to, or derived from, ytterbium; containing ytterbium.
Yt*ter"bi*um (?), n. [NL., fr. Ytterby, in Sweden. See Erbium.] (Chem.) A rare element of the boron group, sometimes associated with yttrium or other related elements, as in euxenite and gadolinite. Symbol Yb; provisional atomic weight 173.2. Cf. Yttrium.
Ytterbium is associated with other rare elements, and probably has not been prepared in a pure state.
Yt"tri*a (?), n. [NL. See Yttrium.] (Chem.) The oxide, Y2O3, or earth, of yttrium.
Yt"tric (?), a. (Chem.) Pertaining to, derived from, or containing, yttrium.
Yt*trif"er*ous (?), a. Bearing or containing yttrium or the allied elements; as, gadolinite is one of the yttriferous minerals.
Yt"tri*ous (?), a. (Chem.) Same as Yttric.
Yt"tri*um (?), n. [NL., from Ytterby, in Sweden. See Erbium.] (Chem.) A rare metallic element of the boron-aluminium group, found in gadolinite and other rare minerals, and extracted as a dark gray powder. Symbol Y. Atomic weight, 89. [Written also ittrium.]
Associated with yttrium are certain rare elements, as erbium, ytterbium, samarium, etc., which are separated in a pure state with great difficulty. They are studied by means of their spark or phosphorescent spectra. Yttrium is now regarded as probably not a simple element, but as a mixture of several substances.
Yt`tro-ce"rite (?), n. (Min.) A mineral of a violet-blue color, inclining to gray and white. It is a hydrous fluoride of cerium, yttrium, and calcium.
{ Yt`tro-co*lum"bite (?), Yt`tro-tan"ta*lite (?), } n. (Min.) A tantalate of uranium, yttrium, and calcium, of a brown or black color.
||Yu (?), n. [Chin.] (Min.) Jade.
Yuc"ca (?), n. (Zoöl.) See Flicker, n., 2.
||Yuc"ca (?), n. [NL., from Yuca, its name in St. Domingo.] (Bot.) A genus of American liliaceous, sometimes arborescent, plants having long, pointed, and often rigid, leaves at the top of a more or less woody stem, and bearing a large panicle of showy white blossoms.
The species with more rigid leaves (as Yucca aloifolia, Y. Treculiana, and Y. baccata) are called Spanish bayonet, and one with softer leaves (Y. filamentosa) is called bear grass, and Adam's needle.
Yucca moth (Zoöl.), a small silvery moth (Pronuba yuccasella) whose larvæ feed on plants of the genus Yucca.
Yuck (?), v. i. [Cf. G. jucken, D. yeuken, joken. See Itch.] To itch. [Prov. Eng.] Grose.
Yuck, v. t. To scratch. [Prov. Eng.] Wright.
Yuck"el (?), n. (Zoöl.) Same as Yockel.
Yu"en (?), n. (Zoöl.) The crowned gibbon (Hylobates pileatus), native of Siam, Southern China, and the Island of Hainan. It is entirely arboreal in its habits, and has very long arms. the males are dark brown or blackish, with a caplike mass of long dark hair, and usually with a white band around the face. The females are yellowish white, with a dark spot on the breast and another on the crown. Called also wooyen, and wooyen ape.
Yufts (?), n. [Russ. iufte.] Russia leather.
{ Yug (?), ||Yu"ga (?), } n. [Skr. yuga an age, a yoke. See Yoke.] (Hindoo Cosmog.) Any one of the four ages, Krita, or Satya, Treta, Dwapara, and Kali, into which the Hindoos divide the duration or existence of the world.