To save this word, you'll need to log in.
py·ro·sphere | \ -ˌsfi(ə)r \
Definition of pyrosphere
1 : the hot central portion of the earth
2 : a hypothetical spherical zone of molten magma that is held to intervene between the crust of the earth and a solid nucleus and to supply lava to volcanoes
Keep scrolling for more
Comments on pyrosphere
What made you want to look up pyrosphere? Please tell us where you read or heard it (including the quote, if possible).
Test Your Vocabulary
Obscure Shapes
- Something that is ooid is shaped like:
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 unabridgedWords at Play
Ask the Editors
Share pyrosphere