Noun
mechanized infantry (countable and uncountable, plural mechanized infantries)
Infantry which uses infantry fighting vehicles (types of tanks) in combination with regular infantery tactics.
Mechanized infantry is distinguished from motorized infantry in that its vehicles provide a degree of protection from hostile fire, as opposed to "soft-skinned" wheeled vehicles (trucks or jeeps) for motorized infantry. Source: Internet
Mechanized infantry are infantry equipped with armored personnel carriers (APCs) or infantry fighting vehicles (IFVs) for transport and combat (see also mechanized force ). Source: Internet