monocellular
/ˌmɒnə(ʊ)ˈsɛljʊlə/Biology
adjective
1Consisting of a single cell; = unicellular.
2Consisting of or involving single cells; (of a layer) one cell deep.
Origin
Mid 19th century; earliest use found in Todd's Cyclopaedia of Anatomy and Physiology. From mono- + cellular. Compare French monocellulaire.