'Upsetting thermometer' definitions:

Definition of 'Upsetting thermometer'

From: GCIDE
  • Upsetting thermometer \Up*set"ting ther*mom"e*ter\ A thermometer by merely inverting which the temperature may be registered. The column of mercury is broken and, as it remains until the instrument is reset, the reading may be made at leisure. [Webster 1913 Suppl.]