SIGLA
Sig"la, n. pl. Etym: [L.]
Defn: The signs, abbreviations, letters, or characters standing for words, shorthand, etc., in ancient manuscripts, or on coins, medals, etc. W. Savage.
SIGMA
Sig"ma, n.; pl. Sigmas. Etym: [L., from Gr.
Defn: The Greek letter S, or s). It originally had the form of the
English C.
SIGMODONT
Sig"mo*dont, n. Etym: [Gr. (Zoöl.)
Defn: Any one of a tribe (Sigmodontes) of rodents which includes all the indigenous rats and mice of America. So called from the form of the ridges of enamel on the crowns of the worn molars. Also used adjectively.
SIGMOID; SIGMOIDAL
Sig"moid, Sig*moid"al, a. Etym: [Gr. sigmoïde.]
Defn: Curved in two directions, like the letter S, or the Greek s.
Sigmoid flexure (Anat.), the last curve of the colon before it
terminates in the rectum. See Illust. under Digestive.
— Sigmoid valves. (Anat.) See Semilunar valves, under Semilunar.
SIGMOIDALLY
Sig*moid"al*ly, adv.
Defn: In a sigmoidal manner.