plesioasters

n. pl. [Gr. plesios, near; aster, star]

(PORIFERA)

Streptasters with few spines from a very short axis. plesiobiosis n. [Gr. plesios, near; biosis, manner of life]

1. A primitive form of association approaching symbiosis.

2. (ARTHROPODA: Insecta)

Living in close proximity, i.e., compound nests of different species of Formicidae and Isoptera; rudimentary form of social symbiosis.