1. quarterly.
2. Chess. queen.
Symbol.
1. the 17th in order or in a series, or, when I is omitted, the 16th.
2. ( sometimes l.c. ) the medieval Roman numeral for 500. Cf. Roman numerals .
3. Biochem. glutamine.
4. Physics. heat.
5. Thermodynam. a unit of heat energy, equal to 10 18 British thermal units (1.055 × 10 21 joules).
6. Also called Q-factor . Electronics. the ratio of the reactance to the resistance of an electric circuit or component.
7. Biblical Criticism. the symbol for material common to the Gospels of Matthew and Luke that was not derived from the Gospel of Mark.