Umbelliferone
(Um`bel*lif"er*one) n. (Chem.) A tasteless white crystalline substance, C9H6O3, found
in the bark of a certain plant and also obtained by the distillation of certain gums from the Umbelliferæ,
as galbanum, asafetida, etc. It is analogous to coumarin. Called also hydroxy- coumarin.
Umbelliferous
(Um`bel*lif"er*ous) a. [Umbel + -ferous: cf. F. ombillifère.] (Bot.) (a) Producing umbels.
(b) Of or pertaining to a natural order (Umbelliferæ) of plants, of which the parsley, carrot, parsnip, and
fennel are well-known examples.
Umbellularia
(||Um*bel`lu*la"ri*a) n. [NL. Umbellule.] (Zoöl.) A genus of deep-sea alcyonaria consisting
of a cluster of large flowerlike polyps situated at the summit of a long, slender stem which stands upright
in the mud, supported by a bulbous base.
Umbellule
(Um"bel*lule) n. [NL. umbellula, dim. of umbella: cf. F. ombellule.] (Bot.) An umbellet.
Umber
(Um"ber) n. [F. ombre ocherous ore of iron, terre d'ombre, It. terra d'ombra, literally, earth of
shadow or shade, L. umbra shadow, shade. Cf. Umber, 3 & 4, Umbrage.]
1. (Paint.) A brown or reddish pigment used in both oil and water colors, obtained from certain natural
clays variously colored by the oxides of iron and manganese. It is commonly heated or burned before
being used, and is then called burnt umber; when not heated, it is called raw umber. See Burnt umber,
below.
2. An umbrere. [Obs.]
3. [F. ombre, umbre, L. umbra.] (Zoöl.) See Grayling, 1.
4. [Cf. NL. scopus umbretta, F. ombrette; probably fr. L. umbra shade, in allusion to its dark brown
color. See Umber a pigment.] (Zoöl.) An African wading bird (Scopus umbretta) allied to the storks
and herons. It is dull dusky brown, and has a large occipital crest. Called also umbrette, umbre, and
umber bird.
Burnt umber (Paint.), a pigment made by burning raw umber, which is changed by this process from
an olive brown to a bright reddish brown. — Cologne, or German, umber, a brown pigment obtained
from lignite. See Cologne earth.
Umber
(Um"ber), a. Of or pertaining to umber; resembling umber; olive-brown; dark brown; dark; dusky.
Their harps are of the umber shade
That hides the blush of waking day.
J. R. Drake. Umber
(Um"ber), v. t. To color with umber; to shade or darken; as, to umber over one's face. B. Jonson.
Umbery
(Um"ber*y) a. Of or pertaining to umber; like umber; as, umbery gold.
Umbilic
(Um*bil"ic) n. [From L. umbilicus: cf. F. ombilic. See Navel.]
1. The navel; the center. [Obs.] "The umbilic of the world." Sir T. Herbert.
2. (Geom.) An umbilicus. See Umbilicus, 5 (b).
Umbilic
(Um*bil"ic) a. (Anat.) See Umbilical, 1.
Umbilical
(Um*bil"ic*al) a. [Cf. F. ombilical. See Umbilic, n.]
1. (Anat.) Of or pertaining to an umbilicus, or umbilical cord; umbilic.
2. Pertaining to the center; central. [R.] De Foe.
