Prostomium (noun) Definition, Meaning & Examples

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noun, plural pro·sto·mi·a [proh-stoh-mee-uh]. /proʊˈstoʊ mi ə/.
  1. the unsegmented, preoral portion of the head of certain lower invertebrates.
noun plural -mia (-mɪə)
  1. the lobe at the head end of earthworms and other annelids: bears tentacles, palps, etc, or forms part of a sucker or proboscis
Prostomium (noun) Definition, Meaning & Examples

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