Pronunciation: (al"u-men-tā'shun), [key]
1. nourishment; nutrition.
2. maintenance; support.
3. addition to the volume of a glacial mass, chiefly by the accumulation of ice, snow, or névé. Cf. ablation (def. 2).
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.