SINCE 1828
prismatic layer
nounDefinition of prismatic layer
1
or less commonly prismatic tissue
: a layer of secondary tissue developed internally by the cambium of some lycopods (as the quillworts) and interpreted as xylem, phloem, or both
2
: the middle layer of the shell of a mollusk consisting essentially of calcium carbonate arranged in prisms
Comments on prismatic layer
What made you want to look up prismatic layer? Please tell us where you read or heard it (including the quote, if possible).
Test Your Vocabulary
Word Puzzles
-
- Which answer pairs best with each of the following words? living, estate, club, music, road, mile
Can you spell these 10 commonly misspelled words?
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
-
Word Puzzles
Challenge yourself with these word puzzles. Can you solve them all?
Take the quiz -
Where in the World? A Quiz
Do you know what languages these words come from?
Take the quiz -
Spell It
Can you spell these 10 commonly misspelled words?
Take the quiz -
Add Diction
Build a chain of words by adding one letter at a time.
Play the game
Share prismatic layer
Resources for prismatic layer