Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
nictus, ūs, m. [1. nico], a winking, blinking with the eyes, Caecil. ap. Paul. ex Fest. p. 177 Müll. (but in Ov. M. 3, 460; id. A. A. 1, 138; and id. F. 1, 418, the correct read. is nutu).