Endospores are hardy, defensive structures that enable some bacteria to survive harmful environmental conditions, such as starvation, high temperatures, desiccation (drying out), chemical disinfectants and extremes in pH.
Recursive formula is a formula that is used to determine the next term of a sequence using one or more of the preceding terms.
recursive definition - (mathematics) a definition of a function from which values of the function can be calculated in a finite number of steps. redefinition-the act of giving a new definition; words like `conservative' require periodic redefinition; she provided a redefinition of his duties.