Noun
(historical) A Roman military javelin.
(botany) The columella on the surface of a pollen grain.
Source: en.wiktionary.orgDuring the 3rd century AD, although the pilum continued to be used, legionaries usually were equipped with other forms of throwing and thrusting spear, similar to auxilia of the previous century. Source: Internet
From the late 2nd century BC, all legionaries were equipped with the pilum. Source: Internet
Rossi op cit 59 In any event, both corps were equipped with the same weapons: gladius (a close-combat stabbing sword) and javelins, although the type of javelin known as pilum seems to have been provided to legionaries only. Source: Internet
Pompey's tactical plan was to allow Caesar's legions to charge while his own stood their ground; reasoning that the enemy would fatigue by charging double distance and that his own men would better withstand the pilum toss while stationary. Source: Internet