ARKOSE
Ar*kose", n. [F] (Petrog)
Defn: A sandstone derived from the disintegration of granite or gneiss, and characterized by feldspar fragments. — Ar*kos"ic (#), a.
ARK SHELL
Ark" shell`. (Zoöl.)
Defn: A marine bivalve shell belonging to the genus Arca and its allies.
ARLES
Arles, n. pl. Etym: [Cf. F. arrhes, Scot. airles. Cf. Earles penny.]
Defn: An earnest; earnest money; money paid to bind a bargain.
[Scot.] Arles penny, earnest money given to servants. Kersey.
ARM Arm, n. Etym: [AS. arm, earm; akin to OHG. aram, G., D., Dan., & Sw. arm, Icel. armr, Goth. arms, L. armus arm, shoulder, and prob. to Gr. rame. Art, Article.]
1. The limb of the human body which extends from the shoulder to the hand; also, the corresponding limb of a monkey.
2. Anything resembling an arm; as, (a) The fore limb of an animal, as of a bear. (b) A limb, or locomotive or prehensile organ, of an invertebrate animal. (c) A branch of a tree. (d) A slender part of an instrument or machine, projecting from a trunk, axis, or fulcrum; as, the arm of a steelyard. (e) (Naut) The end of a yard; also, the part of an anchor which ends in the fluke. (f) An inlet of water from the sea. (g) A support for the elbow, at the side of a chair, the end of a sofa, etc.
3. Fig.: Power; might; strength; support; as, the secular arm; the
arm of the law.
To whom is the arm of the Lord revealed Isa. lii. 1.
Arm's end, the end of the arm; a good distance off. Dryden.
— Arm's length, the length of the arm.
— Arm's reach, reach of the arm; the distance the arm can reach.
— To go (or walk) arm in arm, to go with the arm or hand of one
linked in the arm of another. "When arm in armwe went along."
Tennyson.
— To keep at arm's length, to keep at a distance (literally or
figuratively); not to allow to come into close contact or familiar
intercourse.
— To work at arm's length, to work disadvantageously.