Adjective
eversible (comparative more eversible, superlative most eversible)
able to be turned inside out; able to be everted
Pheromones from species of Rutelinea are produced from epithelial cells lining the inner surface of the apical abdominal segments; amino acid-based pheromones of Melolonthinae are produced from eversible glands on the abdominal apex. Source: Internet
Most other turbellarians have a pharynx that is eversible (can be extended by being turned inside-out), and the mouths of different species can be anywhere along the underside. Source: Internet
The name of the phylum relates to the Greek god of fertility, because their general shape and their extensible spiny introvert (eversible proboscis ) may recall the shape of a penis. Source: Internet