series

se·ries

noun \ˈsi(ə)r-(ˌ)ēz\

plural series

Definition of SERIES

1

: a number of things or events of the same class coming one after another in spatial or temporal succession <described a new series of cases>

2

: a group of specimens or types progressively differing from each other in some morphological or physiological attribute <a series of antitoxins>

3

: a group of chemical compounds related in composition and structure