English

Definition of algae noun from the Oxford Advanced Learner's Dictionary

 

algae

 noun
noun
BrE BrE//ˈældʒiː//
 
; NAmE NAmE//ˈældʒiː//
 
; BrE BrE//ˈælɡiː//
 
; NAmE NAmE//ˈælɡiː//
 
[uncountable, plural]
 
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very simple plants, such as seaweed, that have no real leaves, stems or roots, and that grow in or near water The singular of algae is alga
BrE BrE//ˈælɡə//
 
; NAmE NAmE//ˈælɡə//
 
but this is a specialist term used only in scientific writing.
Word Origin mid 16th cent.: from Latin, ‘seaweed’.
See the Oxford Advanced American Dictionary entry: algae