spiculum

A small needlelike structure, such as a copulatory organ in a nematode.

In zoology, a spicula or spicule.

A needle-shaped splinter of bone.

Same as spicule.

A thrusting javelin used by Romans that replaced the pilum in the late 3rd century.

A sharp, pointed crystal, especially of ice.

A sharp, needle-like structure, especially those making up the skeleton of a sponge.

A small radial emission of gas seen in the chromosphere and corona of the sun.

small pointed structure serving as a skeletal element in various marine and freshwater invertebrates e.g. sponges and corals