heme 
(hēm)
(hēm)n.
A deep red, iron-containing compound, C34H32FeN4O4, that constitutes the nonprotein component of hemoglobin and certain other proteins.
[Short for HEMATIN.]
- quadrivalence
- quadrivalency
- quadrivalent
- quadrivium
- quadroon
- quadru-
- quadru-
- quadrumanal
- quadrumanous
- quadrumvirate
- quadruped
- quadruped
- quadrupedal
- quadrupedalism
- quadrupedally
- quadruple
- quadruplet
- quadruple witching hour
- quadruplicate
- quadruplicately
- quadruplication
- quadruply
- quaestor
- quaestorial
- quaestorship