/hol'euh thoor"ee euhn, hoh'leuh-/ , n.
1. any echinoderm of the class Holothuroidea, comprising the sea cucumbers.
adj.
2. belonging or pertaining to the Holothuroidea.
Also, holothurioid /hol'euh thoor"ee oyd'/ .
[ 1835-45; Holothuri ( a ) genus name (pl. of L holothurium holothoúrion kind of zoophyte, equiv. to holo- HOLO- + -thourion ]