hypothallus

[hahy-puh-thal-uh s, hip-uh-]
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noun, plural hy·po·thal·li [hahy-puh-thal-ahy, hip-uh-] /ˌhaɪ pəˈθæl aɪ, ˌhɪp ə-/.

a layer of hyphae rimming the thallus of certain lichens.
a filmlike residue at the base of the sporangia of certain slime molds.

Nearby words

  1. hypotenuse,
  2. hypoth.,
  3. hypothalamic infundibulum,
  4. hypothalamohypophysial portal system,
  5. hypothalamus,
  6. hypothec,
  7. hypotheca,
  8. hypothecary,
  9. hypothecate,
  10. hypothecium

Origin of hypothallus

From New Latin, dating back to 1850–55; see origin at hypo-, thallus

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for hypothallus

  • 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
  • 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