Single-___ (like an amoeba)

• Like all living organisms
• Single-___ organism

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Cell \Cell\ (s[e^]l), v. t. [imp. & p. p. Celled (s[e^]ld).] To place or inclose in a cell. ``Celled under ground.'' [R.] --Warner. [1913 Webster] ||

Douglas Harper's Etymology Dictionary Word definitions in Douglas Harper's Etymology Dictionary
in compounds, "having cells" (of a certain number or type), from late 18c., from cell (n.).

Wiktionary Word definitions in Wiktionary
a. 1 Containing cells; cellular. 2 (''in combination'') Containing a specific form or number of cells.