- phytoplanktonPlankton, especially those small in size, that obtain energy by photosynthesis.
- phytonOne of the parts which by their repetition make up a flowering plant, each being a single joint of a stem with its leaf or leaves.
- -phyteA member of a taxonomic group of plants or algae, chiefly one whose taxonomic name ends (or ended) in -phyta.
- phytotelmaA small, water-filled cavity in a tree or any similar environment such as the axil of a bromeliad