ACORN-SHELL
A"corn-shell`, n. (Zoöl.)

Defn: One of the sessile cirripeds; a barnacle of the genus Balanus.
See Barnacle.

ACOSMISM
A*cos"mism, n. Etym: [Gr.

Defn: A denial of the existence of the universe as distinct from God.

ACOSMIST
A*cos"mist, n. Etym: [See Acosmism.]

Defn: One who denies the existence of the universe, or of a universe as distinct from God. G. H. Lewes.

ACOTYLEDON
A*cot`y*le"don (#; 277), n. Etym: [Gr. Cotyledon.] (Bot.)

Defn: A plant which has no cotyledons, as the dodder and all flowerless plants.

ACOTYLEDONOUS
A*cot`y*led"on*ous (#; 277), a.

Defn: Having no seed lobes, as the dodder; also applied to plants which have no true seeds, as ferns, mosses, etc.