PTERYGOID a.
r plate of the pterygoid process of the human skull, but which, in all vertebrates below mammals, is not connected with the posterior nares, but serves to connect the palatine bones with the point of suspension of the lower jaw. -- Pterygoid process (Anat.), a process projecting downward from either side of the spheno…
QUADRIGEMINAL; QUADRIGEMINOUS a.
s (Anat.), two pairs of lobes, or elevations, on the dorsal side of the midbrain of most mammals; the optic lobes. The anterior pair are called the nates, and the posterior the testes.
QUINSY n.
An inflammation of the throat, or parts adjacent, especially of the fauces or tonsils, attended by considerable swelling, painful and impeded deglutition, and accompanied by inflammatory fever. It sometimes creates danger of suffocation; -- called also squinancy, and squinzey.
RADIUM n.
oundings, and for their radiations, which are of three kinds: alpha rays, beta rays, and gamma rays (see these terms). By reason of these rays they ionize gases, affect photographic plates, cause sores on the skin, and produce many other striking effects. Their degree of activity depends on the proportion of radium pre…
RESIN n.
Any one of a class of yellowish brown solid inflammable substances, of vegetable origin, which are nonconductors of electricity, have a vitreous fracture, and are soluble in ether, alcohol, and essential oils, but not in water; specif., pine resin (see Rosin).