Definition of signaturist in US English:

signaturist

noun

historical
  • A person who subscribes to the theory or doctrine of signatures in plants.

Origin

Mid 17th century; earliest use found in Thomas Browne (1605–1682), physician and author. From signature + -ist.

Pronunciation

signaturist

/ˈsɪɡnətʃ(ə)rɪst/