In medical jurisprudence. Loss of the faculty or power of articulate speech; a condition In which the patient, while retaining intelligence and understond-ing and with the organs of speech unimpalr-ed, is unable to utter articulate words, or unable to vocalize the particular word which is in his mind and which he wishes to use, or utters words different from those he be-lieves himself to be speaking, or (in "sensory aphasia”) is unable to understand spoken or written language. Tbe seat of tbe disease is in the brain, but it is not a form of insanity