metroscope

Century Dictionary and Cyclopedia

1. n. An instrument for listening to the sounds made by the heart of the fetus in the womb through the vagina.
2. n. A speed-measuring device or tachometer which indicates both speed and distance traveled.

Wiktionary

1. n. A modification of the stethoscope, for directly auscultating the uterus from the vagina.

GNU Webster's 1913

1. n. A modification of the stethoscope, for directly auscultating the uterus from the vagina.