Spicule and Spiculum

Spicule noun - Small pointed structure serving as a skeletal element in various marine and freshwater invertebrates e.g. sponges and corals.

Spiculum is a synonym for spicule. In some cases you can use "Spiculum" instead a noun "Spicule".

Spiculum noun - Small pointed structure serving as a skeletal element in various marine and freshwater invertebrates e.g. sponges and corals.

Spicule is a synonym for spiculum. You can use "Spicule" instead a noun "Spiculum".