hereditary

from The American Heritage® Dictionary of the English Language, 5th Edition.

• adjective Of or relating to heredity or inheritance.
• adjective Transmitted or capable of being transmitted genetically from parent to offspring.
• adjective Passed down from one generation to the next.
• adjective Being such or possessed by reason of birth.
• adjective Capable of being inherited.
• adjective Descending from an ancestor to a legal heir; passing down by inheritance.
• adjective Having title or possession through inheritance.

from The Century Dictionary.

• In law: Descending by inheritance; transmitted or transmissible in the line of descent by force of law; passing to or held by an heir or heirs: as, a hereditary monarchy, office, or estate; hereditary privileges; hereditary bondage.
• Holding by inheritance; deriving from ancestors by force of law, as rank, social condition, or property: as, a hereditary peer, proprietor, or bondman.
• Pertaining to or resulting from successive generation; transmitted in a line of progeny; passing naturally from parent to offspring: as, hereditary descent; a hereditary line; hereditary features, qualities, or diseases.
• Native; patrimonial; ancestral: as, one's hereditary home or occupation; a hereditary opinion or prejudice.
• Acting from natal tendency or endowment; having inherited the character or qualifications of; being by force of birth: as, the Bachs were hereditary musicians; the Rothschilds are hereditary financiers.

from the GNU version of the Collaborative International Dictionary of English.

• adjective Descended, or capable of descending, from an ancestor to an heir at law; received or passing by inheritance, or that must pass by inheritance.
• adjective Transmitted, or capable of being transmitted, as a constitutional quality or condition from a parent to a child.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• adjective which is passed on as inheritance, by last will or intestate
• adjective legally granted to somebody's descendant after that person's death.
• adjective of a person holding a legally hereditary title or rank
• adjective passed from a parent to offspring in the genes
• noun A hereditary ruler; a hereditary peer in the House of Lords.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• adjective occurring among members of a family usually by heredity
• adjective inherited or inheritable by established rules (usually legal rules) of descent