SINCE 1828
bioclast
noun
bio·clast
| \ ˈbī-(ˌ)o-ˌklast
\
\
plural bioclasts
Definition of bioclast
geology
: 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
Keep scrolling for more
Comments on bioclast
What made you want to look up bioclast? Please tell us where you read or heard it (including the quote, if possible).
Test Your Vocabulary
Summer 2019 Words of the Day Quiz
-
- Which is a synonym of desideratum?
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 QUIZLove words? Need even more definitions?
Merriam-Webster unabridged
Words at Play
Ask the Editors
Word Games
-
Summer 2019 Words of the Day Quiz
The Word of the Day takes no vacation.
Take the quiz -
Obscure Shapes
Surprisingly specific words for shapes.
Take the quiz -
Name That Thing
Test your visual vocabulary with our 10-question challenge!
Take the quiz -
SCRABBLE® Sprint
SCRABBLE® fans, sharpen your skills!
Play the game
Share bioclast
Resources for bioclast