A system of plant taxonomy published by Charles Bessey in 1915.

A kind of boat that can be collapsed for greater portability. / (graphical user interface) A display element that can be collapsed to hide it from view.

Any of many marine amoeboid protozoa, of subclass Radiolaria, having filamentous pseudopodia; they have intricate silica skeletons.

(genetics) Pertaining to replication.