This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

n. the arrangement of things in a series

n. the relative dating of archaeological artifacts in a chronological order

n. Arrangement or position in a series.

n. The formation of an orderly sequence or series.

"Previous estimates of early, middle and late Pleistocene time ranges previously determined by biostratigraphic seriation for the Ailuropoda–Stegodon fauna are confirmed in all cases but are made more precise with our approach, including specific time ranges for certain archaic taxa."

series    seriatim    seriate    serial