Pronunciation: pro-tom'e-rit, pro'to-mer'it
Definition: The second segment (lacking a nucleus) of a septate gregarine, between the epimerite and the deutomerite; it becomes the anterior end of the gamont after it has broken free of its host cell, leaving the epimerite embedded (usually in the gut wall of an infected invertebrate).
[proto- + G. meros, part]
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Examples: glitazone, GI cocktail, etc.