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sigmoid

From Wiktionary, the free dictionary

English

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Etymology

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Borrowing from Ancient Greek σῑγμοειδής (sīgmoeidḗs, of the shape of sigma), from σῖγμᾰ (sîgma, sigma) +‎ -ο- (-o-) +‎ -ειδής (-eidḗs, -oid, -like); Equivalent to sigma +‎ -oid. Compare with French sigmoïde.

Pronunciation

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  • IPA(key): /ˈsɪɡ.mɔɪd/
    • Audio (US):(file)
  • Rhymes: -ɪɡmɔɪd

Adjective

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sigmoid (not comparable)

  1. (archaic) Semi-circular, like the uncial or lunate sigma (similar to English C).
  2. Curved in two directions, like the letter "S", or the Greek ς (sigma); having a serpentine shape.
    Synonym: (informal) S-shaped
    1. (mathematics) Exhibiting logistic growth; having a graph that accelerates until it reaches a carrying capacity.
  3. (anatomy) Relating to the sigmoid colon.
    Synonym: sigmoidal

Derived terms

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Translations

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The translations below need to be checked and inserted above into the appropriate translation tables. See instructions at Wiktionary:Entry layout § Translations.

Noun

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sigmoid (plural sigmoids)

  1. (anatomy) Ellipsis of sigmoid colon.
  2. (mathematics) Ellipsis of sigmoid function.[1]
    • 2023 June 29th, “AI will kill all of us | Eliezer Yudkowsky interview” (16:12–16:28 from the start), in The David Pakman Show[1], spoken by Eliezer Yudkowsky, via YouTube:
      If we had the textbook from a hundred years in the future that contains all the simple ideas that actually work, that take so long to identify in practice — the ReLUs instead of sigmoids — for those of us who’ve been following AI for, like, more than the last couple of years and know what I’m taking about there.

Derived terms

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References

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Romanian

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Etymology

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Borrowed from French sigmoïde.

Adjective

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sigmoid m or n (feminine singular sigmoidă, masculine plural sigmoizi, feminine and neuter plural sigmoide)

  1. sigmoid

Declension

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singular plural
masculine neuter feminine masculine neuter feminine
nominative-
accusative
indefinite sigmoid sigmoidă sigmoizi sigmoide
definite sigmoidul sigmoida sigmoizii sigmoidele
genitive-
dative
indefinite sigmoid sigmoide sigmoizi sigmoide
definite sigmoidului sigmoidei sigmoizilor sigmoidelor