seaweed, especially coarse, large seaweed, used chiefly as a fertilizer.
Origin of seaware
before 1000; Old English sǣwār, equivalent to sǣ sea + wār seaweed (not recorded in ME)
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
any of numerous large coarse seaweeds, esp when cast ashore and used as fertilizer
Word Origin for seaware
Old English sǣwār, from sǣ sea + wār seaweed
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012