Definitions

A non-articulated extension of the shaft of a seta or spine. [Watling, 1989]
A short, pointed, tooth-like projection of the cuticle. [Wilson, 1989]
In cirripeds (Balanomorpha), primary or secondary toothlet on sutural edge of radius of compartment plate or opposed buttress of adjoining plate, serving to strengthen articulation of plates. [Moore and McCormick, 1969]
(Taxon-specific: Order Cladocera) One in a series of small, tooth-like projections along postabdomen. Number, position, and relative size are of taxonomic importance. (equal, subequal; smooth, serrate; lateral, marginal). [Stachowitsch, 1992]
(Taxon-specific: Order Stomatopoda) One of numerous smaller tooth-like projections between larger teeth on telson margin; according to position one may distinguish submedian, intermediate, and lateral denticles. [Stachowitsch, 1992]
(Taxon-specific: Class Ostracoda) Small, tooth-like projection on outer surface or hinge of valve. [Stachowitsch, 1992]