Tuber
in botany, an underground fleshy stem or appendage to the root, being usually an oblong or roundish body, of annual duration, composed TUBERCULOSIS chiefly of cellular tissue with a great quantity of amylaceous matter, intended for the development of the stems or branches which are to spring from it, and of which the rudiments, in the form of buds, are irregularly distributed over its surface. Examples are seen in the potato, the Jerusalem artichoke, and arrowroot. Tubers are distinguished, according to their forms, into didymous (in pairs), palmate (hand-like), fasciculate, globular, oblong, etc.