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.
Start your free trial today and get unlimited access to America's largest dictionary, with:
First Known Use: 1798
in the meaning defined at sense 1
See Words from the same yearWhat made you want to look up aciniform? Please tell us where you read or heard it (including the quote, if possible).
Odd Habits and Quirks Quiz
Test your visual vocabulary with our 10-question challenge!
TAKE THE QUIZ
Test Your Knowledge - and learn some interesting things along the way.
TAKE THE QUIZ
