[hahy-puh-thal-uhs, hip-uh-]
noun, plural hypothalli [hahy-puh-thal-ahy, hip-uh-] .
a layer of hyphae rimming the thallus of certain lichens.
a filmlike residue at the base of the sporangia of certain slime molds.

1850–55; < Neo-Latin; see hypo-, thallus

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