A refracting telescope. / anything which refracts light, heat or sound

plural of refractor

The condition of being refractory

Obstinate and unruly; strongly opposed to something. / Not affected by great heat. / (medicine) Difficult to treat. / (biology) Incapable of registering a reaction or stimulus.

A material or piece of material, such as a brick, that has a very high melting point.

(psychology) A delay to the second response to two closely-spaced stimuli

plural of refractory

The quality of being refractory.

(linguistics) A word with no rhyme, a rhymeless word.

In a refractory manner.