A median fold along the body of a fish embryo from which the dorsal, caudal and anal fins develop

plural of banana fold

A long crease below the buttock that results from a deposit of fatty tissue.

Alternative spelling of milliardfold

Alternative spelling of milliardfold

(programming) A feature in many code editors that allows blocks of code to be "folded"; i.e. collapsed or hidden such that they can be shown again later.

(programming, information science) Text normalization where uppercase and lowercase characters are treated as equivalent.

An mirror used to bend an optical path so that it can be made longer than the physical size of the system

A fold mirror that is a "sphere", i.e. a spherical mirror

A fold mirror that is a "flat", i.e. a plane mirror