[pla.nar.ia] n [NL, fr. fem. of LL planarius lying on a plane, fr. L planum plane] (ca. 1909): planarian; esp: any of a genus (Planaria) of 2-eyed planarian worms
PLANARIA
Meaning of PLANARIA in English
Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012