Mutual recommendation of friends' or colleagues' services or products, such as book recommendations in literary reviews.
The act of balancing on a log floating on a river to guide it downstream, often involving rolling it using one's feet; birling.
The rolling of logs from one place to another; an occasion when people meet to help each other roll logs.
A concerted effort to push forward mutually advantageous legislative agendas by combining two items, either or both of which might fail on its own, into a single bill that is more likely to pass.
A sport in which two people balance on a log floating in a body of water, each one aiming to cause the opponent to fall off by rolling or kicking the log.
The responses of individuals to the actions of others.
A relation of mutual dependence or action or influence.
A reciprocal construction involves two noun phrases where each of the participants occupies both the role of agent and patient with respect to the other. see: Wikipedia:Reciprocal pronoun.
A reciprocal relationship.
The characteristic of being reciprocal, e.g. of a relationship between people.
The mutual exchange of rights, privileges or obligations between nations. see: Wikipedia:Reciprocity (international relations).