The opposite of ambidexter. Or perhaps better, the mirror image of it: just as ambidexter comes from Latin ambi- both + dexter, on the right side, ambisiniter comes from ambi- + siniter, on the left side. The prejudice against left-handers, it runs deep, with the right side anciently identified with good, powerful, correct, and the left with awkward, unfavorable, ominous.
I lost the last two fingers of both hands to frostbite as well as the skin of my cheeks, making me truly ambisiniter in both appearance and ability
---L.