The open-mouthed and often dull appearance in children with adenoid hypertrophy, associated with a pinched nose. ... (05 Mar 2000) ... 
the dull expression with open mouth, in children with hypertrophy of the pharyngeal tonsils (adenoids).
Type: Term Definitions: 1. the open-mouthed and often dull appearance in children with adenoid hypertrophy, associated with a pinched nose.