⊿ Point. {R} Glossary. ◢ Keyword: R. ◥ University. {q} PhD. {tr} Training. ⚫ UK. ↂ EndNote. ✊ Harvey (2009) Reciprocity. From Wikipedia, the free encyclopedia Reciprocity may refer to: Law and trade[edit] Social sciences and humanities[edit] Physical sciences and engineering[edit] Mathematics[edit] Other[edit] See also[edit]