What is the meaning of Laminaria?

Any of the genus Laminaria of brown algae.

A thin rod made of the dried stems of this alga, used to dilate the cervix.

first/third-person singular conditional of laminar

oarweed, kelp

laminaria (any kelp of the genus Laminaria)

first/third-person singular conditional of laminar

Source: wiktionary.org