(slang, UK, Australia, New Zealand) Placed or arranged the opposite way to the way it should be. / (slang, UK, Australia, New Zealand) Arranged in a confused or haphazard way; muddled.

plural of lowcard

(initialism) Narrow emission-line quasar. / (typography, computing, initialism) Near letter quality.

(organic chemistry) The quaternary ammonium cation C₁₆H₃₃N(CH₃)₃⁺