Sin"is*trous (?), a. [See Sinister.]
1.
Being on the left side; inclined to the left; sinistral.
"
Sinistrous gravity."
Sir T. Browne.
2.
Wrong; absurd; perverse.
A knave or fool can do no harm, even by the most sinistrous and absurd choice.
Bentley.
© Webster 1913.