blood relation 
(also blood relative)
noun
A person who is related to another by birth rather than by marriage.Which do you think is the blood relative and which the relation because of marriage?...
- Christopher isn't a blood relative of Tony's, but rather an in-law.
- Even though he is not your blood relative, since your parents are married, you two are family and will always be in each other's lives.
- radioimmunochemical
- radioimmunochemically
- radioimmunochemistry
- radioimmunoelectrophoresis
- radioimmunologic
- radioimmunological
- radioimmunologically
- radioimmunology
- radioimmunoprecipitation
- radio industry
- radioiodinate
- radioiodinated
- radioiodination
- Mundugumor
- Mundulla yellows
- mundungus
- mu-neutrino
- mung
- munga
- mungamunga
- mungaree
- mung bean
- munge
- mungi
- mungi-mungi