niches

noun

1. 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.
2. A function within an ecological system to which an organism is especially suited.
3. (by extension) Any position of opportunity for which one is well-suited, such as a particular market in business.
4. An arrow woven into a prayer rug pointing in the direction of qibla.