(organic chemistry) The heterocyclic ketone 6,8-dimethylpyrimido[5,4-e][1,2,4]triazine-5,7-dione

plural of bioscience

(zoology) A behavior in which an animal curls back its upper lip exposing its front teeth, inhales with the nostrils usually closed, and then often holds this position for several seconds.

Any organism of the class Filasterea.