castling

Etymology 1

From cast + -ling.

noun

1. (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
2. (obsolete) The second or third swarm of bees which leaves a hive in a season.
3. A miniature cast or mould.
   From the Celeste's own image was the first castling molded. A soft, delicate creature of flesh and blood she would call Woman. So that Her castlings may never feel the loneliness she Herself did suffer, she bestowed woman with a mate … 2009, Danielle Devon, Divinity in Chains - Page 6
4. One that is cast.
   … shift for themselves, and seek out new habitations; such castlings might in their waudring throughout the South Sea (most of the Oriental Islands being formerly inhabited by by their Off-spring) fall with the coast of Term Primitive Language. 1678, Claude Saumaise, Funus linguae hellenisticae

Etymology 2

From Middle English castellinge, equivalent to castle (verb) + -ing.

noun

1. (chess) 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.
2. (shogi) 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).

verb

1. present participle and gerund of castle