res

(noun) a widely distributed system consisting of all the cells able to ingest bacteria or colloidal particles etc, except for certain white blood cells. Synonyms: reticuloendothelial system, RES.

(noun) a rare heavy polyvalent metallic element that resembles manganese chemically and is used in some alloys; is obtained as a by-product in refining molybdenum. Synonyms: rhenium, Re, atomic number 75.

(noun) ancient Egyptian sun god with the head of a hawk; a universal creator; he merged with the god Amen as Amen-Ra to become the king of the gods. Synonyms: Ra, Re.

(noun) the syllable naming the second (supertonic) note of any major scale in solmization. Synonyms: re, ray.