GMAT Vocabulary Flash Cards @ englishpdf.com and englishteststore.com File 503 phonetic (adj) Representing articulate sounds or speech phonic (adj) Pertaining to the nature of sound phonogram (n) A graphic character symbolizing an articulate sound phonology (n) The science of human vocal sounds phosphorescence (n) The property of emitting light photoelectric (adj) Pertaining to the combined action of light and electricity photometer (n) Any instrument for measuring the intensity of light or comparing the intensity of two lights photometry (n) The art of measuring the intensity of light