pleus·ton 
(plstən, -stŏn′)
(plstən, -stŏn′)n.
Macroscopic organisms that float or swim on the surface of a body of water.
[Greek pleusis, sailing; see pleu- in the Appendix of Indo-European roots + (PLANK)TON.]
pleus·tonic (pl-stŏnĭk) adj.
- adrenaline
- adrenalize
- adrenally
- adrenal medulla
- adrenergic
- adrenergically
- adrenochrome
- adrenocortical
- adrenocorticosteroid
- adrenocorticotrophic
- adrenocorticotrophic hormone
- adrenocorticotrophin
- adrenocorticotropic
- adrenocorticotropic hormone
- adrenocorticotropin
- adrenolytic
- Adrian
- Adrianople
- Adrianople
- Adriatic Sea
- Adrien Marie
- Adrienne
- adrift
- adroit
- adroitly