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Webster 1913 Edition

Noun.

[Gr. [GREEK] stroke, percussion (from [GREEK] to strike) +

-meter

(Med.)

A small, hard, elastic plate, as of ivory, bone, or rubber, placed in contact with body to receive the blow, in examination by mediate percussion.

[Written also

plexometer

pleximeter ‎(plural pleximeters)

(medicine) A small, hard, elastic plate, as of ivory, bone, or rubber, placed in contact with the body to receive the blow, in examination by mediate percussion.

instrument