The substance in the large basophilic granules of the stratum granulosum of the epidermis rich in proline and sulfhydryl groups. [kerato- + hyalin]
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ker·a·to·hy·a·lin -'hī-ə-lən also ker·a·to·hy·a·line -lən, -lēn n a colorless translucent protein that occurs esp. in granules of the stratum granulosum of the epidermis and stains deeply with hematoxylin
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ker·a·to·hy·a·lin (ker″ə-to-hiґə-lin) 1. a substance related to keratin, found in the keratohyalin granules of the granular layer of the epidermis. 2. a substance found in granules in the Hassall corpuscles of the thymus.Medical dictionary. 2011.