14-Letter Words Ending: UM

• loss of equilibrium attributable to an unstable situation in which some forces outweigh others

• Any of very many photosynthetic prokaryotic microorganisms, of phylum Cyanobacteria, once known as blue-green algae.

• The developing skull, composed of cartilage, of an embryo before ossification

• a plant structure that produces megaspores

• Any of the undifferentiated cells in the male gonads that become spermatocytes; a spermatoblast