ˌhälōˈplaŋktən, ˌhōl- noun
Etymology: International Scientific Vocabulary hol- + plankton
: plankton composed of organisms that pass their whole life floating, drifting, or swimming weakly in the water — compare hemiplankton
• hol·o·plank·ton·ic | ̷ ̷ ̷ ̷(ˌ)plaŋk|tänik adjective