physicist

A physicist is a scientist who studies or practices physics. Physicists study a wide range of physical phenomena spanning all length scales: from the sub-atomic particles from which all ordinary matter is made (particle physics) to the behavior of the material Universe as a whole (cosmology). There are numerous branches of physics and each has its corresponding specialists.
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(n.)
One versed in physics.
  

(n.)
A believer in the theory that the fundamental phenomena of life are to be explained upon purely chemical and physical principles; -- opposed to vitalist.
  

Noun
1. a scientist trained in physics
(hypernym) scientist, man of science
(hyponym) acoustician
(classification) physics, physical science, natural philosophy