redia
/ˈriːdɪə/Zoology
noun
A form in the life cycle of many digenean trematodes (flukes), produced asexually within the main molluscan intermediate host from a germinal cell of the sporocyst, and having a saccular body containing a simple digestive tract and germinal cells that give rise to more rediae or to cercariae.
Origin
Late 19th century; earliest use found in Thomas Huxley (1825–1895), biologist and science educationist. From scientific Latin Redia, name of a supposed genus from the name of Francesco Redi, Italian naturalist and poet + scientific Latin -a.