'Planktonic' definitions:
Definition of 'planktonic'
(from WordNet)
adjective
Of or relating to plankton
Definition of 'Planktonic'
From: GCIDE
- Plankton \Plank"ton\ (pl[a^][ng]k"t[o^]n), n. [NL., fr. Gr. plagto`n, neut. of plagto`s wandering, pla`zesqai to wander.] (Biol.) All the animals and plants, taken collectively, which live at or near the surface of salt or fresh waters. -- {Plank*ton"ic}, a. [Webster 1913 Suppl.]