combining form
variants: or


Definition of sinistr-

  1. 1a :  left sinistrad b :  better developed in or using preferentially the left sinistrocular

  2. 2 :  levorotatory sinistrin

Love words? You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Join MWU now and get access to America’s largest dictionary, with:

  • 300,000 words that aren't in our free dictionary
  • Expanded definitions, etymologies, and usage notes
  • Advanced search features
  • Ad free!

Origin and Etymology of sinistr-

Medieval Latin, from Latin sinistr-, sinister left, on the left side

Seen and Heard

What made you want to look up sinistr-? Please tell us where you read or heard it (including the quote, if possible).


feeling or affected by lethargy

Get Word of the Day daily email!