A knot in wood; a large or hard knot, or a protuberance with twisted grain, on a tree. / Something resembling a knot in wood, such as in stone or limbs.

(ichthyology) A member of the family Cyprinidae, which includes other fish such as the common carp, goldfish, and the smaller minnows.

(mathematics) In a coefficientwise way.

Cirrhilabrus cyanopleura, a wrasse native to the eastern Indian Ocean and the western Pacific Ocean.