- Resembling muscle.
- One of the fine, contractile, threadlike protoplasmic elements found in certain epithelial cells in lower animals.
- A contractile part of retinal cones in certain fish and amphibia. In mammals, the myoid is the inner part of the inner segment of rods and cones; it contains microtubules, the Golgi apparatus, endoplasmic reticulum, and ribosomes, but no myofibrils.
[myo- + G. eidos, appearance]
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