noun

• (anatomy) A wing or winglike anatomic process or part, especially of bone.
• (botany) The flattened border of some stems, fruits, and seeds, or one of the two side petals of certain flowers in the pea family.
• (architecture) In ancient Rome, a small room opening into a larger room or courtyard.
• Alternative spelling of Ala.
• (organic chemistry) Initialism of alpha linolenic acid. [(organic chemistry) An omega-3 fatty acid, (9Z,12Z,15Z)-octadeca-9,12,15-trienoic acid, an essential fatty acid, found in many seeds and oils, including flaxseed, walnuts, chia, hemp, and many common vegetable oils.]
• (organic chemistry) Initialism of aminolevulinic acid. [(organic chemistry) Any amino derivative of levulinic acid, but especially 5-aminolevulinic acid which is an intermediate in the biosynthesis of porphyrin]
• Initialism of American Library Association.
• Initialism of Acacia Leadership Academy.
• Initialism of the Atlas of Living Australia.