Alga vs Nemathecium - What's the difference?
alga | nemathecium |
(biology) Any of many aquatic photosynthetic organisms, whose size ranges from a single cell to giant kelps and whose form is very diverse; some are eukaryotic and some prokaryotic; includes the seaweeds.
(botany) A kind of fructification on certain red algae, consisting of an external mass of filaments that separate into tetraspores.
(Webster 1913)