Niche

From Old French niche, from nichier ("make a nest") (modern French nicher), from Latin nÄ«dus ("nest").

Full definition of niche

(plural niches)

(architecture) A cavity, hollow, or recess, generally within the thickness of a wall, for a statue, bust, or other erect ornament. Hence, any similar position, literal or figurative."Images defended from the injuries of the weather by niches of stone wherein they are placed." --Evelyn.
(biology) A function within an ecological system to which an organism is especially suited.
(by extension) Any position of opportunity for which one is well-suited, such as a particular market in business.
An arrow woven into a Muslim prayer rug pointing in the direction of Mecca.