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% replaces any number of letters (la% - lake, lamp)_ replaces one letter (ca_ - car, cat)

Crossword clues for Microscopic algae:

DIATOM: Microscopic algae
DIATOM: Microscopic alga
DESMID: Microscopic alga: Bot.
DIATOM: Microscopic alga: Bot.
DIATOMS: Microscopic algae.
DIATOMS: Microscopic freshwater algae.