sigmoid

/ˈsɪɡ.mɔɪd/

UK: /ˈsɪɡ.mɔɪd/

SꞮꞬ · mɔɪd (2 syllables)

English Adj

Definition

Semi-circular, like the uncial or lunate sigma (similar to English C).

Etymology

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