DEFINITION
noun
an instrument for measuring and indicating temperature, typically one consisting of a narrow, hermetically sealed glass tube marked with graduations and having at one end a bulb containing mercury or alcohol which extends along the tube as it expands.
DERIVATIVESthermometric |θəːməˈmɛtrɪk|adjective,thermometrical |θəːməˈmɛtrɪk(ə)l|adjective,thermometry noun
ORIGIN mid 17th cent.: from French thermomètre or modern Latin thermometrum, from thermo-‘of heat’ + -metrum ‘measure’.
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