n.
1.a constant in the equation of a curve that can be varied to yield a family of similar curves
2.any factor that defines a system and determines (or limits) its performance
3.a quantity (such as the mean or variance) that characterizes a statistical population and that can be estimated by calculations from sample data
Idiom of the Day
take off after (someone or something)
to begin to chase someone or something
The fox took off after the rabbit which jumped out of the hole.
