the GNU version of the Collaborative International Dictionary of English
n. The quality of being inheritable or descendible to heirs.
The Century Dictionary and Cyclopedia
n. The quality of being inheritable, or of being descendible to heirs.
Word Usage
"Upholding the inheritability of acquired characteristics, Jean-Baptiste Lamarck, Trofim Lysenko, Aleksandr Oparin, Friedrich Engels, and Josef Stalin all espoused the primacy of proteins and thus of the environment over the genetic endowment."