lam·i·nar·i·a 
(lăm′ə-nârē-ə)
(lăm′ə-nârē-ə)n.
1. Any of various kelps of the genera Laminaria and Saccharina of temperate and arctic waters, used commercially in foodstuffs, dietary supplements, and medicinal products.
2. A small rod formed of dehydrated laminaria tissue, applied to the cervical os to stimulate dilation.
[New Latin Lāmināria (from Latin lāmina, thin sheet, leaf).]