ˌkyüməˈglȯiə noun
Usage: capitalized
Etymology: New Latin, irregular from Greek kyma sprout, wave, anything swollen + gloia, variant of glia glue — more at clay
: a genus of marine red algae (family Helminthocladiaceae) occurring commonly along the Pacific coast of No. America as a summer annual, the mature thallus consisting of a disk-shaped holdfast and a simple or sparsely branched upper portion with numerous fine cylindrical branches