The Collaborative International Dictionary
Spado
Spado \Spa"do\, n.; pl. Spadones. [L., fr. Gr. ?.]
Same as Spade,
2. (Law) An impotent person.
Douglas Harper's Etymology Dictionary
spado
"castrated person," early 15c., from Latin spado, from Greek spadix, related to spadon "eunuch," span "to draw, tear away" (see spay).
Wiktionary
spado
n. (context now rare English) Someone who has been castrated; a eunuch or castrato.