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| a process that results in differential reproduction among a population so that the inheritable traits of only certain individuals are passed on |
| a mature sexual reproductive cell, such as a sperm or egg, that unites with another cell to form a new organism |
| equation (ɪˈkweɪʒən, -ʃən) | |
| —n | |
| 1. | a mathematical statement that two expressions are equal: it is either an identity in which the variables can assume any value, or a conditional equation in which the variables have only certain values (roots) |
| 2. | the act of regarding as equal; equating |
| 3. | the act of making equal or balanced; equalization |
| 4. | a situation, esp one regarded as having a number of conflicting elements: what you want doesn't come into the equation |
| 5. | the state of being equal, equivalent, or equally balanced |
| 6. | a situation or problem in which a number of factors need to be considered |
| 7. | See chemical equation |
| 8. | astronomy See personal equation |
| e'quational | |
| —adj | |
| e'quationally | |
| —adv | |