Definition of ascidian in English:
A sea squirt.
- Above, a seastar fish swims amongst a garden of ascidians and soft corals.
- Some organisms, such as nematodes and ascidians, have a remarkably precise pattern of cell divisions in early development.
- Boulders are infested with black tree corals, mussels, cowrie shells, soft and hard corals and ascidians.
Definition of ascidian in:
- US English dictionary