(historical) A healthy breakfast served to schoolchildren, typically including wholemeal bread, cheese, milk, and fruit.

A device composed of an odd number of NOT gates whose output oscillates between two voltage levels, representing true and false. The NOT gates, or inverters, are attached in a chain; the output of the last inverter is fed back into the first.

A fish-eating bird of prey of the species Pandion haliaetus.

one of the regular periodic fluctuations in the density of the visible baryonic matter of the universe

plural of osage orange

(meteorology) The largest element of the intraseasonal variability in the tropical atmosphere: a large-scale coupling between atmospheric circulation and tropical deep convection, manifesting itself most clearly as anomalous rainfall.

Initialism of obstructive sleep apnea. / Initialism of osteosarcoma.

Initialism of Ontario Soccer Association. / Initialism of Ontario Society of Artists. / Initialism of Open Solutions Alliance. / Initialism of Oregon Student Association.

(politics) A peace process between Israel and Palestine, begun with the Oslo Accords.

(meteorology) The difference in pressure between the Azores High and the Icelandic Low, which changes periodically and controls the strength of the Westerlies. Usually abbreviated NAO.