Enter a clue or pattern or both:
The Clue
Skeletal support in a sponge (7 letter answer)
The Answer
SPICULE
Tags
Notes
The answer SPICULE is so rare that it appears less than once every 2500 puzzles.
Definition
SPICULE as a noun:
1. (spicule, spiculum) = small pointed structure serving as a skeletal element in various marine and freshwater invertebrates e.g. sponges and corals