An individual portion of food or drink:; SYN. portion, serving.

ETYM French, from Latin portio, akin to pars, partis, a part. Related to Part.
1. One's part of something; one's share.
2. A serving of food.
3. An often limited part set off or abstracted from a whole.

Any of the equal portions into which the capital stock of a corporation is divided and ownership of which is evidenced by a stock certificate
Plowshare
The part allotted or belonging to one of a number owning together property or interest