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triactinal

adjective
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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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History and Etymology for triactinal

tri- + -actinal or -actine

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“Triactinal.” The Merriam-Webster.com Dictionary, Merriam-Webster Inc., https://www.merriam-webster.com/dictionary/triactinal. Accessed 18 January 2020.

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