RACEMIC a.
Pertaining to, or designating, an acid found in many kinds of grapes. It is also obtained from tartaric acid, with which it is isomeric, and from sugar, gum, etc., by oxidation. It is a sour white crystalline substance, consisting of a combination of dextrorotatory and levorotatory tartaric acids. Gregory.…
ROOT n.
any plant louse, or aphid, which lives on the roots of plants, as the Phylloxera of the grapevine. See Phylloxera. -- Root of an equation (Alg.), that value which, substituted for the unknown quantity in an equation, satisfies the equation. -- Root of a nail (Anat.), the part of a nail which is covered by the skin.…
ROSE n.
ts the leaves of various plants, and is often very injurious to rosebushes, apple trees, grapevines, etc. Called also rose bug, and rose chafer. (b) The European chafer. -- Rose bug. (Zoöl.) same as Rose beetle, Rose chafer. -- Rose burner, a kind of gas-burner producing a rose-shaped flame. -- Rose camphor (Chem.),…