I. ˌpīrəˈsōmə noun
Usage: capitalized
Etymology: New Latin, from pyr- + -soma
: a genus (coextensive with the family Pyrosomatidae of the order Ascidiacea) of chiefly tropical free-swimming brilliantly bioluminescent pelagic compound tunicates whose colony forms a hollow cylinder that is closed at one end and is often several feet long
II.
Etymology: New Latin, from pyr- + -soma
synonym of babesia