archaeological

• archæological (Commonwealth)
• archeological (Canada, US)

From archaeology +‎ -ical.

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archaeological (comparative more archaeological, superlative most archaeological)

1. Relating to the science or research of archaeology.
   • 2018, Tim Flannery, Europe: A Natural History, page 202:

     A living floor is, in archaeological terms, the floor of a cave upon which people lived and which retains evidence of their activities.

•   archaeological on Wikipedia.Wikipedia