haptophyte in English dictionary haptophyte Meanings and definitions of "haptophyte" (botany) A kind of unicellular marine phytoplankton, typically covered in tiny scales or plates composed of carbohydrates and calcium deposits. noun (botany) A kind of unicellular marine phytoplankton, typically covered in tiny scales or plates composed of carbohydrates and calcium deposits. more Grammar and declension of haptophyte haptophyte ( plural haptophytes) haptophyte (plural haptophytes) more Haptophyte Sample sentences with "haptophyte" Declension Stem Try again Available translations Catalan Esperanto French German Japanese Low German Portuguese Spanish Authors