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An arsenide of platinum occuring in grains and minute isometric crystals of tin-white color. It is found near Sudbury, Ontario Canada, and is the only known compound of platinum occuring in nature.

Vegetable tissue composed of thin-walled rounded cells, -- a modification of parenchyma.

Speaking with directness; plain-spoken. [Colloq. U.S.] Lowell.

c acid. (a) An acid widely diffused throughout the vegetable kingdom, as in grapes, mountain-ash berries, etc., and obtained from tartar as a white crystalline substance, C2H2(OH)2.(CO2H)2, having a strong pure acid taste. It is used in medicine, in dyeing, calico printing, photography, etc., and also as a substitute f…

Thin-billed; -- applied to birds with a slender bill, as the humming birds.

To thicken. [R.] The nightmare Life-in-death was she, Who thicks man's blood with cold. Coleridge.

d visible at the throat of the corolla, as in long-stamened primroses; -- the reverse of pin-eyed.

s, which has pretty, fragrant, pendulous flowers borne in pairs on a slender stalk. -- Twin-screw steamer, a steam vessel propelled by two screws, one on either side of the plane of the keel.

An inseparable prefix, or particle, signifying not; in-; non-. In- is prefixed mostly to words of Latin origin, or else to words formed by Latin suffixes; un- is of much wider application, and is attached at will to almost any adjective, or participle used adjectively, or adverb, from which it may be desired to form a…

The thin-walled summer spore which is produced during the so- called Uredo stage of certain rusts. See (in the Supplement) Uredinales, Heteroecious, etc.

A small, thin-walled, one-seeded fruit, as of goosefoot. Gray.

l warbler (Pratincola rubetra) common in Europe; -- called also whinchacker, whincheck, whin-clocharet.

ratified rocks which resist the point of the pick. -- for example, to masses of chert. Whin-dikes, and whin-sills, are names sometimes given to veins or beds of basalt.

. -- Widow bewitched, a woman separated from her husband; a grass widow. [Colloq.] Widow-in-mourning (Zoöl.), the macavahu. -- Widow monkey (Zoöl.), a small South American monkey (Callithrix lugens); -- so called on account of its color, which is black except the dull whitish arms, neck, and face, and a ring of pure…