1 However, discomfort in the abdomen for any reason also may cause belching. 2  Therefore, belching does not always indicate the presence of excessive gas in the stomach. 3  Bloating is the subjective feeling that the abdomen is full but does not necessarily mean that the abdomen is enlarged.
caustic(Noun) Any substance or means which, applied to animal or other organic tissue, burns, corrodes, or destroys it by chemical action; an escharotic. caustic(Noun) The envelope of reflected or refracted rays of light for a given surface or object.
caustic 1550s, from O.Fr. caustique, from L. causticus, from Gk. kaustikos capable of burning, from kaustos combustible, from kaiein, the Gk. word for to burn in all periods, of uncertain origin with no known cognates outside Gk. Figurative sense of sarcastic is attested from 1771.