Relating to or affecting the endoplastule or the inner granular substance of a cell.
From endoplastule (endo- + plastule, a diminutive of plastos) + -ar (adjective suffix). A rare technical term from 19th-century protozoology.
This word belongs to a layer of microscopic vocabulary that scientists developed when they could suddenly see inside cells but didn't yet understand what they were looking at—many such terms are now obsolete.
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