Presor or Pressor: How To spell?

The word Presor is misspelled against Pressor, an adjective meaning "Causing, or giving rise to, pressure or to an increase of pressure; as, pressor nerve fibers, stimulation of which excites the vasomotor center, thus causing a stronger contraction of the arteries and consequently an increase of the arterial blood pressure; -- opposed to depressor."

Pressor has double "ss" is mispronounced as "s"
Remember double 'SS' in between the strings pre & or which should not be misspelled with single 'S'
Wrong Spelling:  pre-s-or 
Correct Spelling:  pre-ss-or 
Find more incorrect spellings of Pressor to spell right way.

You might be interested to know

Puisantly or Puissantly?

Relese or Relesse?

Sargaso or Sargasso?