What's the difference between plessimeter and pleximeter?

Plessimeter

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Definition:

• (n.) See Pleximeter.

Example Sentences:

Pleximeter

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Definition:

• (n.) 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.

Example Sentences:

• (1) This led to Piorry's invention in 1826 of the pleximeter (le plessimétre) to help outline the internal organs (l'organographisme), which he described inDe la Percussion Médiate (1828).