rare. [prob. ad. F. contagiosité or med.L. *contagiōsitās, f. L. contāgiōs-us CONTAGIOUS: see -ITY. Littré has the F. only as a neologism, but it may have occurred in OF.] Contagious quality.
1430. Lydg., Chron. Troy, V. xxxvi. By the enuyous false contagyosytie, Of the serpent pompouse and ellate.
1882. Syd. Soc. Lex., Contagiosity, the quality or amount of contagion in different diseases.
