- rhenium, Re, atomic number 75 - 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
--1 is a kind of system; metallic element, metal; system; metallic element, metal
--1 is a part of immune system
--1 has parts: mononuclear phagocyte system, MPS, system of macrophages - Ra, Re - ancient hawk-headed Egyptian sun god; a universal creator
--2 is a kind of Egyptian deity; Egyptian deity
- re, ray - the syllable naming the second (supertonic) note of any major scale in solmization
--3 is a kind of solfa syllable; solfa syllable