sigmoid

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Related to sigmoidal: S curve, sigmoidal kinetics, Sigmoid curve

sigmoid

 [sig´moid]
1. shaped like the letter C or S.
2. the sigmoid colon, the distal part of the colon from the level of the iliac crest to the rectum.

sig·moid

(sig'moyd),
Resembling in outline the letter S or one of the forms of the Greek sigma.
[G. sigma, the letter S, + eidos, resemblance]

sigmoid

/sig·moid/ (sig´moid)
1. shaped like the letter C or S.

sigmoid

(sĭg′moid′) also

sigmoidal

(sĭg-moid′l)
adj.
1. Having the shape of the letter S.
2. Of or relating to the sigmoid colon.

sigmoid

[sig′moid]
Etymology: Gk, sigma, the letter S, eidos, form
1 adj, pertaining to an S shape.
2 n, the sigmoid colon.

sig·moid

(sig'moyd)
Resembling in outline the letter S or one of the forms of the Greek character, sigma.
[G. sigma, the letter S, + eidos, resemblance]

sigmoid

or

sigmoidal

S-shaped.
2. Pertaining to the SIGMOID COLON.

sigmoid

S-shaped.

Sigmoid

The S-shaped curve of the large intestine where the colon joins the rectum.
Mentioned in: Intestinal Polyps

sig·moid

(sig'moyd)
Resembling in outline the letter S or one of the forms of the Greek sigma σ or ς.
[G. sigma, the letter S, + eidos, resemblance]

sigmoid (sig´moid),

adj of or pertaining to an S shape, as in the shape of the pelvic end of the colon prior to its joining the rectum.
sigmoid notch,

sigmoid

shaped like the letter C or S.

sigmoid colon
the distal part of the colon of some species, such as humans, shaped like an S, from the level of the iliac crest to the rectum.
sigmoid curve
an S-shaped curve of the relationship between two variables.
sigmoid flexure of the penis
situated in the bull's penis dorsal and caudal to the scrotal neck.
References in periodicals archive ?
It controls shape, orientation and steepness of sigmoidal activation function (AF), and therefore needs to be included.
A further limitation of this research is that the value of the parameters in the sigmoidal equations underlying the brand equity model are somewhat ad hoc; even though they represent the authors' experience, more research is needed on the best specifications of these parameters values.
The trend in tensile strength was again fitted to a sigmoidal curve as a guide.
cotton residues (100 : 0), 70 : 30, and 50:50, were sigmoidal and were best described ([R.
The transfer function of hidden neurones was of tangent sigmoidal type, while the transfer function in the output layer was linear.
The activation function used in the BPN is the sigmoidal function.
The reader's task involves detection and discrimination of a signal, similar to that required in studies of auditory detection or visual discrimination, where data (appropriately scaled) often take sigmoidal form [3-4].
Para a determinacao do periodo anterior a interferencia (PAI) e do periodo total de prevencao a interferencia (PTPI), os dados de produtividade comercial foram analisados e processados separadamente dentro de cada grupo de tratamento e submetidos a analise de regressao pelo modelo sigmoidal de Boltzmann, considerando-se aceitavel 5% de perda de produtividade.
In the absence of added metal ions, melting curve data for the modified oligonucleotides and the salmon sperm DNA displayed characteristic sigmoidal behavior and transition temperatures in the range of 38.
Parathyroid chief cells are the most renowned calcium sensing cells in the body, as reflected by the crucial inverse sigmoidal relationship between PTH and [Ca.
Theoretical models predict that the diffusion of cultural traits will typically exhibit a sigmoidal ('S' shaped) pattern over time (Boyd & Richerson 1985; Cavalli-Sforza & Feldman 1981), while asocial learning has been expected to result in a linear, non-acceleratory, or at least non-sigmoidal increase in frequency (Lefebvre 1995).
outlined a sigmoidal shaped mineralised zone consisting of dense sheet-veining