laver

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

To roast a leg, haunch, or saddle of mutton. […] A modern refinement is to put laver in the dripping-pan, which, in basting, imparts a high gout; or a large saddle may be served over a pound and a half of laver, stewed in brown sauce with catsup and seasonings.

Other seaweeds similar in appearance or use, especially

Other seaweeds similar in appearance or use, especially:

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

That which laves, particularly a washbasin.

Infinit streames continually did well / Out of this fountaine, sweet and faire to see, / The which into an ample lauer fell […]

One who laves: a washer.