Capsule

>In medicine, a membranous structure that envelops an organ, a joint, tumor, or any other part of the body.

It is usually made up of dense collagen-containing connective tissue.

>In pharmacy, a solid dosage form in which the drug is enclosed in a hard or soft soluble container, usually of a form of gelatin.

>In microbiology, a coat around a microbe, such as a bacterium or fungus.

</LI></OL> Derived from the diminutive of the Latin word 'capsa' meaning 'box', a capsule is literally 'a little box' and can refer to any encompassing structure or small container.