The most common and most likely answer to this crossword clue is the 4 letter word SIAL which also is the latest solution we found used in USA Today in 2014.
Outer portion of the earth crossword clue answers
Here's a list of possible crossword answers ranked by the most likely to least likely.
| Answer | Likelyness | Letters |
|---|---|---|
| SIAL | 100 % | 4 |
Words with a meaning similar to the clue: Outer portion of the earth
These words may or may not be a possible solution to this crosswords clue.- lithosphere
- crust
- space
- spaced
- spacing
- ground
- grounded
- land
- cornea
- exosphere
- back
- face
Crossword Answer definitions
SIAL noun- The rocks rich in silicon and aluminum that form the upper layer of the earth's crust, which lies beneath all continental landmasses.
More crossword clues leading to the same solutions
Here's a few more crossword clues - all leading to the identical solution