1. the top, to top.
2. an oval or thumb-nail shaped area of light-colored feathers covering the crown of lizard canaries.
- dental c. — 1. residual deciduous teeth sitting on top of erupting permanent teeth. — 2. a crown prosthesis.
- dental c. stage — the earliest stage in the development of the tooth, in the form of a tooth bud growing out of the primitive dental lamina.
- spermatozoal c. — invests the head of the spermatozoa. Called also acrosomal cap, head cap.




