What is the meaning of Laver?

A red alga/seaweed, Porphyra umbilicalis (syn. Porphyra laciniata), eaten as a vegetable.

Other seaweeds similar in appearance or use, especially:

1. Porphyra vulgaris

Porphyra vulgaris

Where one laves, a washroom, particularly a lavatorium, the washing area in a monastery.

That which laves, particularly a washbasin.

One who laves: a washer.

indefinite plural of lav

present tense of lave

to wash

to wash oneself

a water-plant, possibly water parsnip (Sium latifolium)

↑ http://www.perseus.tufts.edu/hopper/text?doc=Perseus:text:1999.04.0059:entry%3Dlaver

first-person singular present passive subjunctive of lavō

A kind of water plant.

alternative form of lavour

indefinite plural of lav

to wash

to get washed

to wash

Source: wiktionary.org