A rhombus is a geometric shape often colloquially described as a diamond. Rhombus may also refer to: Music Rhombus (band), a roots reggae band from New Zealand Rhombus (UK band), British gothic rock band Bullroarer, a musical instrument Other uses Reticulum, a southern constellation, once called Rhombus Rhombus formation, a troop formation Rhombus Media, a Canadian film and television production company Reusable Orbital Module, Booster, and Utility Shuttle (ROMBUS), a proposed reusable single-stage-to-orbit space launch vehicle See also Rhombic (disambiguation) Rhumb (disambiguation)