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Webster 1913 Edition

Adj.

[L.

primipilaris

, fr.

primipilus

the centurion of the first cohort of a Roman legion, fr.

primus pilus

the division made up of the triarii in the Roman army.]

Of or pertaining to the captain of the vanguard of a Roman army.

Barrow.

Adj.

[L. primipilus, the centurion of the first cohort of a Roman legion.] Pertaining to the captain of the vanguard.

primipilar ‎(not comparable)

Of or relating to the captain of the vanguard of a Roman army.
(Can we find and add a quotation of Barrow to this entry?)