3. Dangerous error, or schism, tending to draw persons to apostasy. Looking diligently, . . . lest any root of bitterness springing up trouble you. Heb. xii. 15.

BITTERNUT
Bit"ter*nut", n. (Bot.)

Defn: The swamp hickory (Carya amara). Its thin-shelled nuts are bitter.

BITTERROOT
Bit"ter*root`, n. (Bot.)

Defn: A plant (Lewisia rediviva) allied to the purslane, but with fleshy, farinaceous roots, growing in the mountains of Idaho, Montana, etc. It gives the name to the Bitter Root mountains and river. The Indians call both the plant and the river Spæt'lum.

BITTERS
Bit"ters, n. pl.

Defn: A liquor, generally spirituous in which a bitter herb, leaf, or root is steeped.

BITTER SPAR
Bit"ter spar".

Defn: A common name of dolomite; — so called because it contains magnesia, the soluble salts of which are bitter. See Dolomite.

BITTERSWEET
Bit"ter*sweet`, a.