noun

• A red alga/seaweed, Porphyra umbilicalis (syn. Porphyra laciniata), eaten as a vegetable.
• Other seaweeds similar in appearance or use, especially:
• Porphyra vulgaris
• One who laves: a washer.
• Where one laves, a washroom, particularly a lavatorium, the washing area in a monastery.
• That which laves, particularly a washbasin.
• A surname from Anglo-Norman.