the GNU version of the Collaborative International Dictionary of English
n. The quality of being refrangible.
The Century Dictionary and Cyclopedia
n. The property of being refrangible; susceptibility of refraction; the disposition of rays of light, etc., to be refracted or turned out of a direct course in passing out of one medium into another.
Word Usage
"Neither when I spoke of red, or blue, and green, as well as refrangibility, had I these several colors, or the rays of light passing into a different medium, and there diverted from their course, painted before me in the way of images."