The Collaborative International Dictionary
Defectuosity
Defectuosity \De*fec`tu*os"i*ty\ (?; 135), n. [Cf. F.
d['e]fectuosit['e].]
Great imperfection. [Obs.]
--W. Montagu.
Wiktionary
defectuosity
n. (context obsolete English) Great imperfection.