Looking diligently, . . . lest any root of bitterness springing up trouble you.
Heb. xii. 15.
Bit"ter*nut", n. (Bot.) The swamp hickory (Carya amara). Its thin-shelled nuts are bitter.
Bit"ter*root` (&?;), n. (Bot.) 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.
Bit"ters (&?;), n. pl. A liquor, generally spirituous in which a bitter herb, leaf, or root is steeped.
Bit"ter spar" (&?;). A common name of dolomite; -- so called because it contains magnesia, the soluble salts of which are bitter. See Dolomite.
Bit"ter*sweet` (&?;), a. Sweet and then bitter or bitter and then sweet; esp. sweet with a bitter after taste; hence (Fig.), pleasant but painful.
Bit"ter*sweet`, n. 1. Anything which is bittersweet.