bin.is ADJ 1 1 DAT P X POS
bin.is ADJ 1 1 ABL P X POS
binus, bina, binum ADJ [XXXEO] uncommon
two by two; 2 each; in pairs; 2 at time; on 2 occasions; double, twofold;
bin.is NUM 1 2 DAT P X DIST
bin.is NUM 1 2 ABL P X DIST
duo -ae o, secundus -a -um, bini -ae -a, bis NUM [XXXAX]
2 each/apiece/times/fold/together/at a time - 'how many each'; by 2s;

Credits:
This, our local install of the popular standby Whitaker's Words, is possible thanks to the resurrection of the venerable project at William Whitaker's Words, where you will also find extensive documentation. The corresponding GitHub repository is where you can submit issues about missing forms and analyses.
This web interface by Walter M. Shandruk.