The contractor grabbed a reciprocating saw to cut the old metal pipe from behind the wall.

Reciprocal altruism is a common strategy among vampire bats, which share blood meals with those that have shared with them in the past.

The mechanic inspected the old reciprocating engine and found worn piston rings causing the oil leak.

The linguistics professor explained how the reciprocal pronoun functions in sentences like "each other" and "one another".

The contractors loaded several reciprocating saws into the truck before heading to the demolition site.

In physics class, we learned that pressure and volume are connected by a reciprocal proportion.

Researchers discovered several prime reciprocal magic squares that exhibited unexpected symmetries when converted to modular arithmetic.

At the conference, the mathematician presented a prime reciprocal magic square built from the repeating decimal digits of 1/7.