ala

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. Zoology A wing or winglike structure or part.
2. n. Anatomy A flat, winglike anatomic process or part, especially of bone.
3. n. 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.

Century Dictionary and Cyclopedia

1. n. 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.
2. n. In mosses, one of the basal lobes or auricles of the leaves.
3. n. An axilla or axil.
4. n. In anat., zoöl., etc.:
5. n. A wing.
6. n. Any part of a wing-like or flap-like character: as, ala auris, the upper and outer part of the external ear.
7. n. The armpit.
8. n. 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.
9. n. In anc. Rom. arch., a wing or a small apartment placed on each side of the atrium of a Roman house. Audsley.

Wiktionary

1. n. A wing or winglike structure.
2. n. A winglike anatomical process or part, especially of bone.
3. n. The flattened border of some stems, fruits, and seeds, or one of the two side petals of certain flowers in the pea family.
4. n. In ancient Rome, a small room opening into a larger room or courtyard.
5. prep. alternative form of a la.

GNU Webster's 1913

1. n. A winglike organ, or part.

WordNet 3.0

1. n. a wing of an insect
2. n. a flat wing-shaped process or winglike part of an organism