pisciculus

Etymology
From.

Noun

 * 1) minnow
 * 2) tiddler
 * 3) In plural, an early name for Christians, in reference to the waters of baptism, and in allusion to the vesica piscis
 * 1) In plural, an early name for Christians, in reference to the waters of baptism, and in allusion to the vesica piscis