Definitions
1.Verbpresent participle and gerund of reciprocate
2.AdjectiveThat moves back and forth or up and down.
3.AdjectiveOf an engine type, that has one or more pistons that move back and forth or up and down.
4.AdjectiveOf an other machine, whose mechanism relies on a back and forth or up and down motion.
5.AdjectiveOf a person or their actions, responding in kind."reciprocating behavior"