Definition of "dexter"

my Mothers bloud / Runs on the dexter checke, and this ſiniſter / Bounds in my fathers:

c. 1602, William Shakespeare, “The Tragedie of Troylus and Cressida”, in Mr. William Shakespeares Comedies, Histories, & Tragedies […] (First Folio), London: […] Isaac Iaggard, and Ed[ward] Blount, published 1623, [Act V, scene v], column 2

Displaying his dexter palm, he exclaimed that there was a hand that never took a bribe; whereupon a smart auditor cried "How about the one behind your back?"

1887, George William Foote with J. M. Wheeler, Crimes of Christianity, London: Progressive Publishing

Clovis wiped the trace of Turkish coffee and the beginnings of a smile from his lips, and slowly lowered his dexter eyelid.

1911, Saki, ‘The Match-Maker’, The Chronicles of Clovis

[…] the dexter lion being gorged […]

1998 July 6, Auguste Vachon, Claire Boudreau, Daniel Cogné, Genealogica & Heraldica: Ottawa 1996, University of Ottawa Press, page 324

Subtracting the second from the first, the third from the second and the first from the third successively, we obtain, after transposition, the following identities: — [several equations] But, the sinisters being exact differentials, the dexters are so. Consequently [...]

1879, London Mathematical Society, Proceedings of the London Mathematical Society, page 112

On the dexter of the court is a long hall with an arched ceiling and a door, leading to a small oblong shrine with a vaulted ceiling.

1971, Debala Mitra, Buddhist Monuments