Real Dictionary

core
a person or thing that promotes [...]
a unit of heredity composed of DNA occupying a fixed position on a chromosome (some viral genes are composed of RNA). A gene may determine a characteristic of an individual by specifying a polypeptide chain that forms a protein or part of a protein ( stru
any of a large group of nitrogenous compounds of high molecular weight that are essential constituents of all living organisms. They consist of one or more chains of amino acids linked by peptide bonds and are folded into a specific three-dimensional shap
land governed by a ruler or government [...]
the central part of certain fleshy fruits, such as the apple or pear, consisting of the seeds and supporting parts [...]
The core of a fruit is the central part of it. It contains seeds or pips.
the full complement of genetic material within an organism [...]