Etymograph

English

actograph

Actograph comes from German Aktograph.

  1. Germanc. 1650–presentAktograph
  2. Englishtodayactograph

attested reconstructed ? uncertain or disputed

Lineage

  1. Germanc. 1650–presentAktograph
  2. Englishtodayactograph

Today it means

noun A device that records the movements of a sleeping person.

Language periods are conventional ranges, not dates for this word.

Etymograph / German Aktograph / actograph