MICA n.
ls characterized by highly perfect cleavage, so that they readily separate into very thin leaves, more or less elastic. They differ widely in composition, and vary in color from pale brown or yellow to green or black. The transparent forms are used in lanterns, the doors of stoves, etc., being popularly called isinglas…
MILK n.
thistle (Bot.), an esculent European thistle (Silybum marianum), having the veins of its leaves of a milky whiteness. -- Milk thrush. (Med.) See Thrush. -- Milk tooth (Anat.), one of the temporary first set of teeth in young mammals; in man there are twenty. -- Milk tree (Bot.), a tree yielding a milky juice, as th…
MO a.
to the names of certain numerals or to the numerals themselves, to indicate the number of leaves made by folding a sheet of paper; as, sixteenmo or 16mo; eighteenmo or 18mo. It is taken from the Latin forms similarly used; as, duodecimo, sextodecimo, etc. A small circle, placed after the number and near its top, is oft…
MOSS n.
A cryptogamous plant of a cellular structure, with distinct stem and simple leaves. The fruit is a small capsule usually opening by an apical lid, and so discharging the spores. There are many species, collectively termed Musci, growing on the earth, on rocks, and trunks of trees, etc., and a few in running water.…
MOUNTAIN a.
ental tree, the Pyrus (Sorbus) Americana, producing beautiful bunches of red berries. Its leaves are pinnate, and its flowers white, growing in fragrant clusters. The European species is the P. aucuparia, or rowan tree. -- Mountain barometer, a portable barometer, adapted for safe transportation, used in measuring the…