Definition of: insessorial

(in′sə·sôr′ē·əl, -sō′rē-) adjective
1. Of or pertaining to a former order or class (Insessores) of perching birds.
2. Perching or fitted for perching, as a bird's foot. [<L insessor a sitter <insessum, pp. of insidere sit on <in- on + sedere sit]