versicularius

versicularius [CL versiculus+-arius], (liturg.) of or relating to the versicle: a (as sb. m.) one who sings or says the versicle. b (perh. w. ellips. of liber) book containing versicles. a a ij juvenibus, sc. a ~io et contraversiculario ‥ incepta letania Ord. Ebor. I 13; breve responsum cantatur a ~io post lectionem lectam Ib. II 342.  b sunt in ecclesia ‥ sex processionalia et novem ~ii et septem alii nigri Vis. S. Paul. 325.