2. (Zoöl.) Of, pertaining to, or designating, a system of organs which
eliminate nitrogenous waste matter from the blood of certain
invertebrates.
U`ro*pyg"i*al (?), a. [See Uropygium.] (Anat.) Of or pertaining to the
uropygium, or prominence at the base of the tail feathers, in birds.
Uropygial gland, a peculiar sebaceous gland at the base of the tail
feathers in most birds. It secretes an oily fluid which is spread over
the feathers by preening.
||U`ro*pyg"i*um (?), n. [NL., fr. Gr. &?;, (corrupted form) &?;; &?;
||the end of the os sacrum + &?; rump.] (Anat.) The prominence at the
||posterior extremity of a bird's body, which supports the feathers of
||the tail; the rump; — sometimes called pope's nose.
||
U`ro*sa"cral (?), a. [2d uro- + sacral.] (Anat.) Of or pertaining to
both the caudal and sacral parts of the vertebral column; as, the
urosacral vertebræ of birds.
U*ros"co*py (?), n. [1st uro- + - scopy: cf. F. uroscopie.] The
diagnosis of diseases by inspection of urine. Sir T. Browne.
U"ro*some (?), n. [2d uro- + - some body.] (Zoöl.) The abdomen, or
post-abdomen, of arthropods.
U"ro*stege (?), n. [2d uro- + Gr. &?; roof.] (Zoöl.) One of the plates
on the under side of the tail of a serpent.
||U*ros"te*on (?), n.; pl. L. Urostea (#), E. Urosteons (#). [NL., fr.
||Gr. &?; the tail + &?; a bone.] (Anat.) A median ossification back of
||the lophosteon in the sternum of some birds.
||
U`ro*ster"nite (?), n. [2d uro- + sternum.] (Zoöl.) The sternal, or
under piece, of any one of the uromeres of insects and other
arthropods.
U"ro*style (?), n. [2d uro- + Gr. &?; a pillar.] (Anat.) A styliform
process forming the posterior extremity of the vertebral column in some
fishes and amphibians.
U"rox (?), n. [See Aurochs, and cf. Urus.] (Zoöl.) The aurochs.
U*rox"a*nate (?), n. (Chem.) A salt of uroxanic acid.
U`rox*an"ic (?), a. [Uric + alloxan.] (Chem.) Pertaining to, or
designating, an acid, C5H8N4O6, which is obtained, as a white
crystalline substance, by the slow oxidation of uric acid in alkaline
solution.
U`ro*xan"thin (?), n. [1st uro- + xanthin.] (Physiol. Chem.) Same as
Indican.
Ur*rho"din (?), n. [1st uro- + Gr. &?; a rose.] (Physiol. Chem.) Indigo
red, a product of the decomposition, or oxidation, of indican. It is
sometimes found in the sediment of pathological urines. It is soluble
in ether or alcohol, giving the solution a beautiful red color. Also
called indigrubin.
Ur"ry (?), n. [Cf. Gael. uir, uireach, mold, clay.] A sort of blue or
black clay lying near a vein of coal.
Ur"sa (?), n. [L. ursa a she-bear, also, a constellation, fem. of ursus
a bear. Cf. Arctic.] (Astron.) Either one of the Bears. See the Phrases
below.
Ursa Major [L.], the Great Bear, one of the most conspicuous of the
northern constellations. It is situated near the pole, and contains the
stars which form the Dipper, or Charles's Wain, two of which are the
Pointers, or stars which point towards the North Star. — Ursa Minor
[L.], the Little Bear, the constellation nearest the north pole. It
contains the north star, or polestar, which is situated in the
extremity of the tail.
Ur"sal (?), n. (Zoöl.) The ursine seal. See the Note under 1st Seal.
Ur"si*form (?), a. [L. ursus, ursa, a bear + -form.] Having the shape
of a bear.
Ur"sine (?), a. [L. ursinus, from ursus a bear. See Ursa.] Of or
pertaining to a bear; resembling a bear.
Ursine baboon. (Zoöl.) See Chacma. — Ursine dasyure (Zoöl.), the
Tasmanian devil. — Ursine howler (Zoöl.), the araguato. See Illust.
under Howler. — Ursine seal. (Zoöl.) See Sea bear, and the Note under
1st Seal.
Ur"son (?), n. [Cf. Urchin.] (Zoöl.) The Canada porcupine. See
Porcupine.
Ur"suk (?), n. (Zoöl.) The bearded seal.
Ur"su*la (?), n. (Zoöl.) A beautiful North American butterfly
(Basilarchia, or Limenitis, astyanax). Its wings are nearly black with
red and blue spots and blotches. Called also red-spotted purple.
Ur"su*line (?), n. [Cf. F. ursuline.] (R. C. Ch.) One of an order of
nuns founded by St. Angela Merici, at Brescia, in Italy, about the year
1537, and so called from St. Ursula, under whose protection it was
placed. The order was introduced into Canada as early as 1639, and into
the United States in 1727. The members are devoted entirely to
education.
Ur"su*line, a. Of or pertaining to St. Ursula, or the order of
Ursulines; as, the Ursuline nuns.
||Ur"sus (?), n. [L., a bear.] (Zoöl.) A genus of Carnivora including
||the common bears.
||
||Ur*ti"ca (?), n. [L., a nettle.] (Bot.) A genus of plants including
||the common nettles. See Nettle, n.
||
Ur`ti*ca"ceous (?), a. (Bot.) Of or pertaining to a natural order
(Urticaceæ) of plants, of which the nettle is the type. The order
includes also the hop, the elm, the mulberry, the fig, and many other
plants.
Ur"tic*al (?), a. Resembling nettles; — said of several natural orders
allied to urticaceous plants.
||Ur`ti*ca"ri*a (?), n. [NL. See Urtica.] (Med.) The nettle rash, a
||disease characterized by a transient eruption of red pimples and of
||wheals, accompanied with a burning or stinging sensation and with
||itching; uredo.
||
Ur"ti*cate (?), v. t. & i. [imp. & p. p. Urticated (?); p. pr. & vb. n.
Urticating.] To sting with, or as with, nettles; to irritate; to annoy.
G. A. Sala.
Ur`ti*ca"tion (?), n. (Med.) The act or process of whipping or stinging
with nettles; — sometimes used in the treatment of paralysis.
U*ru*bu" (?), n. [Cf. Pg. urubú a certain Brazilian bird.] (Zoöl.) The
black vulture (Catharista atrata). It ranges from the Southern United
States to South America. See Vulture.
||U"rus (?), n. [L.; of Teutonic origin. See Aurochs.] (Zoöl.) A very
||large, powerful, and savage extinct bovine animal (Bos urus or
||primigenius) anciently abundant in Europe. It appears to have still
||existed in the time of Julius Cæsar. It had very large horns, and was
||hardly capable of domestication. Called also, ur, ure, and tur.
||
Ur"va (?), n. [NL.] (Zoöl.) The crab-eating ichneumon (Herpestes urva),
native of India. The fur is black, annulated with white at the tip of
each hair, and a white streak extends from the mouth to the shoulder.
Us (?), pron. [OE. us, AS. &?;s; akin to OFries. & OS. &?;s, D. ons, G.
uns, Icel. & Sw. oss, Dan. os, Goth. uns, L. nos we, us, Gr. &?; we,
Skr. nas us. &?;&?;&?;&?;. Cf. Nostrum, Our.] The persons speaking,
regarded as an object; ourselves; — the objective case of we. See We.
"Tell us a tale." Chaucer.
Give us this day our daily bread.
Matt. vi. 11.
Us"a*ble (?), a. Capable of being used.