A miniature cast or mould.
One that is cast.
The act of constructing a defense structure in Japanese chess in which the king (玉) is positioned in a certain way so that it is protected by pawns (歩) and silver general(s) (銀) and/or gold general(s) (金) often with an additional knight (桂) and lance (香車).
A move in which the king moves two squares towards a rook, and the rook moves to the other side of the king; the action of the verb to castle.
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 relation of mutual dependence or action or influence.
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).
The responses of individuals to the actions of others.