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Pronunciation: ko'no-mi-oy'din

Definition: Contractile protoplasm at the inner end of the inner segment of retinal cones; motility is most evident in fishes and amphibians, and slight or absent in mammals.

[G. konos, cone, + mys, muscle, + eidos, resemblance]

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© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review date: Sep 19, 2016.