A large-scale transportation system in which the passengers do not travel in their own vehicles.

(physics) The unit of mass in the system of Planck units, defined as: m_P=√≈2.1765⨯10⁻⁸ mbox kg

(Christianity) A special mass over and above those ordinarily said for the day, for some particular grace or purpose, and provided by some individual.

(thermodynamics) Synonym of heat capacity

(Christianity) A mass resembling a High Mass, but without some of its special ceremonies.

plural of mass shooting

(Roman Catholicism) The oldest anaphora used in the Roman rite of Mass.

(medicine) The anatomic and physiological effect that an ectopic mass (such as a tumor, hematoma, or pleural effusion) causes by displacing or pushing against eutopic structures. It may squeeze and thus occlude blood vessels or lymphatic vessels; pinch nerves; disrupt gastrointestinal volume and peristalsis; and so on.

plural of mass flow

(physics) Half of the harmonic mean of two given masses.