hy·​po·​thallus | \ "+\

Definition of hypothallus

1 : a marginal outgrowth of hyphae from the thallus in crustose lichens
2 : a residue like a film that remains after the formation of sporangia in slime molds of the class Myxomycetes

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History and Etymology for hypothallus

New Latin, from hypo- + thallus

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