| (genetics) a segment of DNA that is involved in producing a polypeptide chain; it can include regions preceding and following the coding DNA as well as introns between the exons; it is considered a unit of heredity |
| an abstract part of something |
| an independent variable in statistics |
| anything that contributes causally to a result |
| a businessman who buys or sells for another in exchange for a commission |
| one of two or more integers that can be exactly divided into another integer |
| any of the numbers (or symbols) that form a product when multiplied together |