ala

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun Zoology A wing or winglike structure or part.
• noun Anatomy A flat, winglike anatomic process or part, especially of bone.
• noun Botany The flattened border of some stems, fruits, and seeds, or either one of the two side petals of certain flowers in the pea family.

from The Century Dictionary.

• noun In botany: One of the two side petals of a papilionaceous blossom, or the membranous expansion of an organ, as of a fruit, seed, stem, etc. See cut under banner.
• noun In mosses, one of the basal lobes or auricles of the leaves.
• noun An axilla or axil.
• noun In anat., zoöl., etc.:
• noun A wing.
• noun Any part of a wing-like or flap-like character: as, ala auris, the upper and outer part of the external ear.
• noun The armpit.
• noun plural Specifically, in Cirripedia, the lateral parts of the shell, as distinguished from the parietes, when they are overlapped by others; when they overlap they are termed radii.
• noun In anc. Rom. arch., a wing or a small apartment placed on each side of the atrium of a Roman house. Audsley.

from the GNU version of the Collaborative International Dictionary of English.

• noun (Biol.) A winglike organ, or part.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun zoology A wing or winglike structure.
• noun anatomy A winglike anatomical process or part, especially of bone.
• noun botany The flattened border of some stems, fruits, and seeds, or one of the two side petals of certain flowers in the pea family.
• noun architecture In ancient Rome, a small room opening into a larger room or courtyard.
• preposition colloquial Alternative form of a la.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a wing of an insect
• noun a flat wing-shaped process or winglike part of an organism