sigmoid | 
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| 1. | [ adjective ] curved in two directions (like the letter S) | |
| Related terms: | curve | |
| 2. | [ adjective ] of or relating to the sigmoid flexure in the large intestine | |
| Synonyms: | sigmoidal | |
| Related terms: | sigmoid_colon sigmoid_colon | |
| Similar spelling: | 
  sigmoidal Sigmodon  | 
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