plural -s
: any of several synthetic rubbers that are polymers or copolymers of an acrylic ester (as ethyl acrylate) and are characterized by good resistance to flexing and good resistance to hydrocarbon oils, oxygen and ozone, weather, and heat but not to low temperatures

Word History


lact- + isoprene

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:

  • More than 250,000 words that aren't in our free dictionary
  • Expanded definitions, etymologies, and usage notes
  • Advanced search features
  • Ad free!

Dictionary Entries Near lactoprene

Cite this Entry

“Lactoprene.” Dictionary, Merriam-Webster, Accessed 13 Jun. 2024.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!