subcaliber

adj

adj

Etymology From sub- + caliber.

Smaller than the caliber of a firearm.

2 more examples

subcaliber practice
The M9101 on the Longsword fires subcaliber projectiles at such speeds that they would immediately begin to burn up from air friction when fired within an atmosphere.2017 September 5, Kenneth Peters, Halo: Warfleet – An Illustrated Guide to the Spacecraft of Halo, Bloomsbury, →ISBN, →OCLC, page 17:

Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.