Podiceps grisegena a migratory aquatic bird found in the temperate regions of the northern hemisphere.

(mathematics) The use of a mathematical notation in a way that is not formally correct but seems likely to simplify the exposition or suggest the correct intuition.

plural of abuse of notation

(derogatory) being out of key

(derogatory) the state of being out of key

Any of the types of more or less viscous, spicy, chili-based sauces typical of Thai cuisine.

nappy rash

Something that is trendy, popular; the latest fashion.

plural of narrow squeak

(informal) A narrow escape; a close shave.