(n.) One of a class of amorphous nitrogenous principles, containing, as a rule, a small amount of sulphur; an albuminoid, as blood fibrin, casein of milk, etc. Proteids are present in nearly all animal fluids and make up the greater part of animal tissues and organs. They are also important constituents of vegetable tissues. See 2d Note under Food.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). Proteid. Retrieved September 22, 2026, from http://smartdefine.org/proteid/definitions/2050176 |
| Chicago | Webster's. 2011. "Proteid" http://smartdefine.org/proteid/definitions/2050176 (accessed September 22, 2026). |
| Harvard | Webster's 2011, Proteid, Smart Define, viewed 22 September, 2026, <http://smartdefine.org/proteid/definitions/2050176>. |
| MLA | Webster's. "Proteid" 27 May 2011. Web. 22 September 2026. <http://smartdefine.org/proteid/definitions/2050176> |