to fall below a normal or desirable level in physical, mental, or moral qualities; deteriorate
to produce, cause, or give rise to
a record or account of the ancestry and descent of a person, family, group, etc.
well-born and well-bred people; an upper or ruling class
marriage between a man and woman of different races, especially, in the U.S., between a black and a white person
the deliberate and systematic extermination of a national, racial, political, or cultural group
a full set of chromosomes; all the inheritable traits of an organism
the belief in the possibility of improving the qualities of humans by discouraging reproduction by people having genetic defects or encouraging reproduction by people having desirable traits
any disease-producing agent, especially a virus, bacterium, or other microorganism
a funeral home
the stiffening of the body after death
bringing death; fatally
near death; on the verge of extinction or termination
the removal of a piece of tissue from a living body for diagnostic study
a recurring biological process, such as sleep, that is controlled by the daily cycle of an organism
any interdependent or mutually beneficial relationship between two persons, groups, etc.
a method of learning to control one's bodily functions by monitoring one's own brain waves, blood pressure, etc.
the ecosystem comprising the entire earth and the living organisms that inhabit it
organic matter, especially plant matter, that can be converted to fuel and is therefore regarded as a potential energy source