sigmoid

Meaning

Adjective

• Semi-circular, like the uncial or lunar sigma (similar to English C).
• Curved in two directions, like the letter "S", or the Greek ς (sigma); having a serpentine shape.
• Relating to the sigmoid colon.

Origin

• Borrowing from Ancient Greek σῑγμοειδής ("of the shape of sigma"), from σῖγμᾰ + -ο-; Equivalent to sigma + -oid. Compare with French sigmoïde.