diactine
noun
di·ac·tine
(ˈ)dīˈakˌtīn,
-tə̇n
variants or diact or less commonly diactin
ˈdīˌakt
(ˈ)dīˈaktə̇n
plural -s
: a sponge spicule having two pointed arms
Word History
Etymology
di- + Greek aktin-, aktis ray