Sigmodont

Sig"mo*dont

(?), n. [Gr. sigma () + , , a tooth.] (Zol.) 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.
[1913 Webster]

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Sig"moid

(?),

Sig*moid"al

(?), } a. [Gr. ; sigma + e'i^dos form, likeness: cf. F. sigmode.] Curved in two directions, like the letter S, or the Greek .
[1913 Webster]

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.
[1913 Webster]

 

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Wed 12th December 2018