Adjective
rack-mountable (comparative more rack-mountable, superlative most rack-mountable)
Capable of being rack-mounted
Hardware requirement A rack-mountable server with the top cover removed to reveal internal components Hardware requirement for servers vary widely, depending on the server's purpose and its software. Source: Internet
Rack-mountable equipment is usually designed to occupy some integer number of U. For example, an oscilloscope might be 4U high, and rack-mountable computers are mostly between 1U and 4U high. Source: Internet