bioclast

play
noun bio·clast \ˈbī-(ˌ)o-ˌklast\

Definition of bioclast

plural

bioclasts

geology

  1. :  a fragment of biological origin (such as a shell fragment or fossil) occurring in sedimentary rock You can have fabrics full of bioclasts—fragments of organic origin, such as bits of plants or clamshells—and you can classify the kinds of mineral grains, their size and distribution. — Karen Chin, quoted in Discover, June 1996

NEW

First Known Use: 1963

See Words from the same year

There's more!

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!
Already a subscriber? Log in.

1963

First Known Use of bioclast

1963


Seen and Heard

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

Love words? Need even more definitions?

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

WORD OF THE DAY

acid in temper, mood, or tone

Get Word of the Day daily email!

Love words? Need even more definitions?

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