spiculum

noun

The gladiator threw his spiculum at his opponent.

意味（1）

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

意味（2）

A sharp, pointed crystal, especially of ice.

意味（3）

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

意味（4）

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