[pho.nol.o.gy] n (1799) 1: the science of speech sounds including esp. the history and theory of sound changes in a language or in two or more related languages
2: the phonetics and phonemics of a language at a particular time -- pho.no.log.i.cal also pho.no.log.ic adj -- pho.no.log.i.cal.ly adv -- pho.nol.o.gist n