sematrope

From sema- +‎ -trope.

sematrope (plural sematropes)

1. (dated) An instrument for signalling by reflecting the rays of the sun in different directions.

• heliotrope
• semaphore
• semiotics

• Edward H[enry] Knight (1877) “Sematrope”, in Knight’s American Mechanical Dictionary. […], volumes III (REA–ZYM), New York, N.Y.: Hurd and Houghton […], →OCLC.
• “sematrope”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.

• ropemates