- A succession of similar objects following one another in space or time.
- In chemistry, a group of substances, either elements or compounds, having similar properties or differing from each other in composition by a constant ratio.
- In diagnostic medicine, denotes a group of related tests adding up to an examination to either establish or rule out a given type of diagnosis.
[L. fr. sero, to join together]
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Examples: glitazone, GI cocktail, etc.