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cephalometer
cephalometer n. 
/ˌkɛfəˈlɒmᵻtə/,
Brit. /ˌsɛfəˈlɒmᵻtə/
, /ˌsɛfəˈlɒmᵻtə//ˌkɛfəˈlɒmᵻtə/U.S. /ˌsɛfəˈlɑmədər/
[ < French céphalomètre (P. Topinard 1876); compare -meter comb. form2] ‘an instrument formerly used for ascertaining the size of the fœtal head during parturition; also, an instrument used in the measurement of the different angles of the skull’ ( New Sydenham Soc. Lexicon)./ˌsɛfəˈlɑmədər/Π
1878 R. T. H. Bartley tr. P. Topinard Anthropol. ii. iii. 296 A special cephalometer.
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