coronule

noun

cor·​o·​nule

ˈkȯrəˌnyül,

kəˈrōˌ-

plural -s

: the peripheral ring of spines on the shells of some diatoms (as members of the genus Stephanodiscus)

Word History

Etymology

New Latin coronula, from Medieval Latin, from Latin corona crown + -ula -ule

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