castling

1. A miniature cast or mould.

2. One that is cast.

3. (uncountable, usually)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.

   Rochade

   рокиро́вкаrokiróvka

4. (uncountable, usually)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).

5. (obsolete)An abortion, or a premature birth.

   1646: Wherein notwithstanding, we should rather rely upon the urine in a castling’s bladder — Sir Thomas Browne, Pseudodoxia Epidemica, Book II, ch 5

6. (obsolete)The second or third swarm of bees which leaves a hive in a season.

regular