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hypothallus

[hahy-puh-thal-uh s, hip-uh-] /ˌhaɪ pəˈθæl əs, ˌhɪp ə-/
noun, plural hypothalli
[hahy-puh-thal-ahy, hip-uh-] /ˌhaɪ pəˈθæl aɪ, ˌhɪp ə-/ (Show IPA)
1.
a layer of hyphae rimming the thallus of certain lichens.
2.
a filmlike residue at the base of the sporangia of certain slime molds.
Origin of hypothallus
1850-1855
1850-55; < New Latin; see hypo-, thallus
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the Web for hypothallus
Historical Examples
  • The hypothallus is quite distinct, extra-marginal, and in substance like to the peridial wall.

    The North American Slime-Moulds Thomas H. (Thomas Huston) MacBride
  • The hypothallus is sometimes noticeable under some of the sporangia where closely crowded, but is not a constant feature.

    The North American Slime-Moulds Thomas H. (Thomas Huston) MacBride
  • Plasmodiocarp very much flattened, longitudinally creeping and reticulate or altogether widely effused; hypothallus none.

  • In the centre of the fructification, next the hypothallus, the sporangia are very imperfectly differentiated.

    The North American Slime-Moulds Thomas H. (Thomas Huston) MacBride

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