undulationist

English

Etymology

From undulation +‎ -ist.

Noun

undulationist (plural undulationists)

1. (archaic) One who believes that light is a wave.
   • 1833, William Whewell, Address Delivered in the Senate-House at Cambridge:

     the undulationist will conceive that his opinions have gained no small accession of evidence by this exemplification of what they will account for

References

“undulationist”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.