Spiculum

//ˈspɪkjʊləm// noun

Definitions

Noun
  1. 1
    A thrusting javelin used by Romans that replaced the pilum in the late 3rd century.
  2. 2
    small pointed structure serving as a skeletal element in various marine and freshwater invertebrates e.g. sponges and corals wordnet
  3. 3
    A sharp, pointed crystal, especially of ice.
  4. 4
    A sharp, needle-like structure, especially those making up the skeleton of a sponge.
  5. 5
    A small radial emission of gas seen in the chromosphere and corona of the sun.

Etymology

From Latin spīculum (“a little sharp point”), from spīcum, alternative form of spīca (“point, spike”).

Next best steps

Mini challenge

Unscramble this word: spiculum