Divided into or containing cells; having a cellular structure with distinct compartments or chambers.
From cell (Latin cella, small chamber) plus the adjectival suffix -ed. This became a standard biological term to describe structures with organized cellular divisions.
When scientists say 'single-celled' versus 'multi-celled,' they're using this ancient word—'celled'—to capture one of nature's most fundamental organizing principles that separates bacteria from humans.
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