“The rebellious teenager was refractory to his parents' rules and constantly challenged their authority.”

“Capulet's attitude to his refractory daughter is precisely that of my Muslim patients' fathers.”

“Despite facing numerous setbacks, the refractory leader remained steadfast in his decision, refusing to alter his course of action.”

“Often the fractured platelike secretions and crystalloid forms were associated with refractile spherical particulate debris.”

“Yeast cells can be mistaken for red blood cells since they have a double refractile wall which may simulate the donut appearance of red cells.”

“In addition, the testes contained highly refractile cysts that most likely represent degenerating cysts of spermatogonial cells.”

“Several sheaths have a refringent, transparent central lumen and appear empty.”

“Droplets of extractives only appeared in the inner ring of sapwood in some cells of the ray parenchyma as small refringent bodies.”

“These were filled with mature, refringent spores, as observed under the microscope.”

“These proteins, aptly called crystallins, give the lens its refractive properties and long-term transparency.”

“Photorefractive keratectomy evolved concurrently with the development of laser technology within refractive surgery.”

“Concave lenses with minus or divergent power correct this refractive error and refocus the light rays on the correct point on the retina.”

“Light is decomposed by the prism, because its component parts are refrangible in different degrees, by the same refracting medium.”

“Minium reflects the least refrangible or red-making Rays most copiously, and thence appears red.”

“Violets reflect the most refrangible most copiously, and thence have their Colour, and so of other Bodies.”

“Another example of brutal disregard of the most common promptings of nature, is that of a refractious son who was so incorrigible that his father condemned him to death.”