tri·actinal
| \ (ˈ)trī¦aktənəl, ¦trīˌak¦tīnᵊl \
variants:
or less commonly triactine \
(ˈ)trī¦akˌtīn , -tə̇n
\
Definition of triactinal
: having three rays
a triactinal sponge spicule
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