Neat and tidy; possessing order. / Methodical or systematic. / Peaceful; well-behaved. / Being on duty; keeping order; conveying orders.

A hospital attendant given a variety of non-medical duties. / (military) A soldier who carries out minor tasks for a superior officer.

(now rare) According to good order or practice; appropriately, in a well-behaved or orderly (adjective) way. / (obsolete) In order; in a particular order or succession; with a suitable arrangement.

The fragrant white flower of the orange tree, Citrus sinensis.

(cricket) The batsmen, constituting the tail, who bat last - roughly in positions 8 to 11.

(cricket, baseball, softball) The sequence in which a side's batsmen go in to bat.

A potent herbicide and defoliant used by US forces in the Vietnam War.

Pertaining to the faith, practices, etc. of the Eastern Orthodox Church.

(quantum mechanics, chemistry) A mathematical function that describes the wave-like behavior of either one electron or a pair of electrons in an atom. This function can be used to calculate the probability of finding any electron of an atom in any specific region around the atom's nucleus.

(quantum mechanics, chemistry) The quantum mechanical behaviour of an electron in a molecule describing the probability of the electron's particular position and energy; approximated by a linear combination of atomic orbitals.