dilatometer

dil·a·tom·e·ter   (dĭl'ə-tŏm'ĭ-tər, dī'lə-)    n.  An instrument used to measure thermal expansion and dilation in solids and liquids. [dilate + -meter.] dil'a·to·met'ric (-tə-mět'rĭk) adj., dil'a·tom'e·try n.

Main Entry: di·la·tom·e·ter
Pronunciation: "dil-&-'täm-&t-&r, "dIl-
Function: noun
: an instrument for measuringthermal dilatation or expansion especially in determining coefficients of expansion of liquids or solids —di·la·to·met·ric /"dil-&t-&-'me-trik/ adjective —di·la·to·met·ri·cal·ly /-tri-k(&-)lE/ adverb —di·la·tom·e·try /"dil-&-'täm-&-trE, "dIl-/ noun plural -tries