sigmoid
adj.
"shaped like a C" (1660s) or "shaped like an S" (1786), from sigma, q.v. + -oid. Especially of the flexure of the colon (1891).
| 词汇 | sigmoid |
| 词根词缀 | Online Etymology Dictionary sigmoid adj. "shaped like a C" (1660s) or "shaped like an S" (1786), from sigma, q.v. + -oid. Especially of the flexure of the colon (1891). |
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