Definition of ascidian in English:

ascidian

noun

Zoology
  • A sea squirt.

    • ‘Boulders are infested with black tree corals, mussels, cowrie shells, soft and hard corals and ascidians.’
    • ‘Some organisms, such as nematodes and ascidians, have a remarkably precise pattern of cell divisions in early development.’
    • ‘Aided by currents, the Haven has attracted all the filter-feeding creatures such as crinoids and ascidians, and there are plenty of holes to be occupied.’
    • ‘Above, a seastar fish swims amongst a garden of ascidians and soft corals.’
    • ‘Cloney has provided a clear description of the types of organs in ascidians.’

Origin

Mid 19th century: from modern Latin plural Ascidia (genus name), from Greek askidion, diminutive of askos wineskin.

Pronunciation:

ascidian

/əˈsɪdɪən/