1. Devoid of cells. SYN: noncellular (2). 2. A term applied to unicellular organisms that do not become multicellular and are complete within a single cell unit; frequently applied to protozoans to emphasize their complete organization within a single cell. [G. a- priv. + L. cellula, a small chamber]
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acel·lu·lar (')ā-'sel-yə-lər adj
1) containing no cells <\acellular vaccines>
2) not divided into cells: consisting of a single complex cell used esp. of protozoans and ciliates
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acel·lu·lar (a-selґu-lər) not made up of or containing cells.Medical dictionary. 2011.