Crossword puzzle clue "primitive period"

Here are the possible solutions for primitive period clue

Answer
Clue
Relevancy
darkages
Clue
Primitive period
ironage
Clue
Primitive period
abaci
Clue
Primitive calculators
Primitive counters
Primitive computers
Primitive adders
Definition
ABACUS, (Latin) a counting frame using beads
abacus
Clue
Primitive counting device
Primitive calculator
Definition
(Latin) a counting frame using beads

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