Definition of orthotriaene in English:
orthotriaene
noun
Zoology
A sponge spicule with three short rays projecting at right angles from a longer ray.
Origin
Late 19th century; earliest use found in William Sollas (1849–1936), geologist and anthropologist. From ortho- + triaene.
Pronunciation
orthotriaene
/ˌɔːθə(ʊ)ˈtrʌɪiːn/