Preposition: of

• bone: Any spicules of bone preventing access by his finger were chipped away with a cleaver.

Converse of object

• have: Some species have calcareous spicules deposited in the tunic which would make them rather like eating gristle with sand embedded in it.

Adjective modifier

• calcareous: Some species have calcareous spicules deposited in the tunic which would make them rather like eating gristle with sand embedded in it.

• microscopic: A simple sponge is a bag of cells surrounding a cavity, supported by microscopic spicules.

Noun used with modifier

• sponge: The rocks are typically ' cleaner ' quartz sands and rather unfossiliferous apart from beds of microscopic sponge spicules.

• bone: Remove any bone spicules with a bone rasp or bur.