D defs.my
Entry 1 sense Webster, 1913

Upsetting thermometer

· Up·set·ting ther·mom·e·ter · IPA
01 A thermometer by merely inverting which the temperature may be registered. The column of mercury is broken and, as it remains until the ins…
  1. 1.
    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.