recip.

Adjective

reciprocal (not comparable)

1. Of a feeling, action or such: mutual, uniformly felt or done by each party towards the other or others; two-way.
   • reciprocal love

   Synonyms:

   reciprocating

2. Mutually interchangeable.
   • These two rules will render a definition reciprocal with the thing defined.1725, Isaac Watts, Logick: Or, The Right Use of Reason in the Enquiry after Truth, […], 2nd edition, London: […] John Clark and Richard Hett, […], Emanuel Matthews, […], and Richard Ford, […]...
3. Expressing mutual action, applied to pronouns and verbs; also in a broad sense: reflexive.
4. Used to denote different kinds of mutual relation; often with reference to the substitution of reciprocals for given quantities.

See all 6 meanings of reciprocal

Adjective

reciprocating (not comparable)

1. That moves back and forth or up and down.
2. Of an engine type, that has one or more pistons that move back and forth or up and down.
3. Of an other machine, whose mechanism relies on a back and forth or up and down motion.
4. Of a person or their actions, responding in kind.
   • reciprocating behavior

   Synonyms:

   reciprocal, reciprocatory