plural noun
Ce·​ram·​i·​a·​les | \sə̇ˌramēˈā(ˌ)lēz, -rām-\

Definition of Ceramiales 

: an order of red algae characterized by having the auxiliary cell formed after fertilization — compare ceramiaceae, rhodymeniales

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History and Etymology for Ceramiales

New Latin, from Ceramium + -ales

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living or existing for a long time

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