seaware

sea·ware

S0197700 (sē′wâr′)n. Sea wrack used as fertilizer.
[Possibly Old English sǣwār : , sea + wār, seaweed; see wei- in Indo-European roots.]

seaware

(ˈsiːˌwɛə) n (Plants) any of numerous large coarse seaweeds, esp when cast ashore and used as fertilizer[Old English sǣwār, from sea + wār seaweed]