Green’s Dictionary of Slang

1. a prisoner.

1823		‘Jon Bee’ Dict. of the Turf, the Ring, the Chase, etc.
1835		G. Kent Modern Flash Dict. 3: Academician – a scholar at an academy.

2. a prostitute.

1835		G. Kent Modern Flash Dict. 3: Academician – [...] a whore at a brothel.
1848		Flash Dict. in Sinks of London Laid Open.
1890–1904		Farmer & Henley Sl. and Its Analogues.