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Glite Dictionary
sigmoidal

sigmoidal

9.9
Shaped like the letter S in the lower part of the large intestine
  • adjective
  • /sɪɡˈmɔɪdəl/
  • Specialized
translation icon : sigmoide
  • There would then be a transition from rapid growth to a "steady state," best described by a logistic or sigmoidal curve.

Examples

  • In biology, a sigmoidal trend is often observed in populations, indicating phases of growth followed by a steady state.

  • In fact, we think that like the valves we're using have some kind of sigmoidal function.

  • It adds things up, adds up the different inputs, and then goes through a sigmoidal function and gives you an output Y.

  • So N Infinity goes from zero at negative voltages, sigmoidal activation, up to one at high voltages.

  • By contrast, in the healthy ear (Figure 2A, upper curve), the amplitude increase follows the nonlinear, sigmoidal slope, which reflects amplification by the OHCs.

    Academic text (1998)

  • The scientist illustrated the growth patterns using a sigmoidal curve to show the transition from rapid growth to a plateau.

  • The data revealed a sigmoidal shape, reflecting how the population stabilized after a period of rapid increase.

Synonyms

sigmoid
vssigmoidal
  • Specialized
9.9

Relating to the S-shaped part of the large intestine

is used mainly for relation to that intestinal bend

Surface Forms

sigmoidal positive

Morphology

sigmoidal = sigmoid (transparent) = sigmoid + al

The adjective is a straightforward formation from the base 'sigmoid' with the productive adjectival suffix '-al', so knowing 'sigmoid' lets learners infer the meaning.

Etymology

Sigmoidal comes from the Greek letter sigma and the related word sigmoid, because sigma looks like the letter 'S'. So sigmoidal means 'S-shaped', which is why the sigmoidal part of the large intestine or a sigmoidal curve bends like an 'S'.