mecometer

me·com·e·ter

(mē-kom'ĕ-tĕr),
An instrument, such as calipers with a scale attachment, for measurement of newborn infants.
[G. mēkos, length, + metron, measure]

mecometer

An obsolete, mid-19th-century caliper-like device that was used to measure the length of a newborn baby. It is not used in the working medical parlance.