-etic

"pertaining to or resulting from diarrhea," 1650s, from diarrhea + -etic. Related: Diarrhetical.

in taxonomy, "arranged by overall similarity based on all available characters," coined 1960, from Greek phainein "bring to light, cause to appear, show" (from PIE root *bha- (1) "to shine") + -etic. Related: Phenetically.