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 their Off-ſpring) fall with the coaſt of Peru, […]1678, Claude Saumaise, Funus linguae hellenisticae, pages 121–122:
castling
noun
UK /ˈkɑːsəlɪŋ/ · US /ˈkæsəlɪŋ/
Etymology From Middle English castellinge, equivalent to castle (verb) + -ing.
1
Board games, Chess, GamesUsually 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.
Castling is prevented temporarily: […] If there is any piece between the king and the rook with which castling is to be effected.2022, “2023 Laws of Chess”, in FIDE, pages 7, 8:
2
Board games, Games, ShogiUsually 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).