- n Porphyra a genus of protoctist
Century Dictionary and Cyclopedia
- n porphyra A small genus of florideous algæ giving name to the suborder Porphyreæ. The fronds are gelatinous, membranaceous, and composed of a single layer of brownish-red cells bearing the spores on the margin of the frond, eight in number, arising from a single mother-cell. P. laciniata, the laver, is the best-known and most widely distributed species. It has fronds from 3 to 18 inches in length, of a livid-purple color. See laver, 1, and marine sauce (under marine).
- n porphyra [lowercase] In medicine, same as purpura.