plural of sectarism

(obsolete) sectarianism

(surgery) An incision in the abdomen for surgery on any of the abdominal organs.

(physics) The cross section (probability) of a neutron capture reaction

One who narrow-mindedly devotes themselves to a particular sect, especially in religion.

An instrument used for measuring the dip of the horizon.

Used other than figuratively or idiomatically: see married, sector.

plural of sectarianist

(astrophysics, cosmology, astronomy, physics) The unknown portion of the Universe outside standard physics, including dark matter and dark energy.

(Canada, US) The seats high in the back of bleachers, stands, or the balcony at a theater or stadium, usually cheaper and with a poorer view than other seats.