sub·con·trar·y 
(sŭb-kŏntrĕr′ē)
(sŭb-kŏntrĕr′ē)n. pl. sub·con·tra·ries
Logic
Logic
A proposition related to another in such a way that both may be true, but both cannot be false.
- allopatric
- allopatrically
- allopatry
- allophane
- allophone
- allophonic
- allophonically
- allopolyploid
- allopolyploidy
- allopurinol
- all-or-none
- all-or-nothing
- allosaur
- allosaurid
- allosaurus
- allospecies
- allosteric
- allosterically
- allostery
- allot
- allotment
- allotransplant
- allotransplantation
- allotrope
- allotropic