Pronunciation: [kˈʌsps] (IPA) 
The word "cusps" is spelled with a "c" followed by a "u" and "s," and then another "p" and "s" at the end. In IPA phonetic transcription, the word is pronounced as /kʌsps/, with stress on the first syllable. It refers to the pointed ends or tips of a shape, such as the teeth in a comb or a leaf's edge. The spelling of this word is straightforward and follows standard English rules for consonant and vowel combinations.
Cusps, in a general context, refer to the pointed or rounded ends or tips of an object, typically describing a protrusion or sharp projection on an edge or ridge. The term is commonly used in various fields, including mathematics, anatomy, dentistry, and astronomy.
In mathematics, cusps are points on a curve or a boundary where there is a rapid change in direction. They signify the intersection of two curves or the endpoint of a curve segment. Cusps can also be observed on the graphs of functions where a sharp bend or corner occurs.
In anatomy, cusps are prominent, pointed or rounded structures found in various organs, particularly teeth and heart valves. Tooth cusps are the elevated portions on the chewing surface of molars and premolars, responsible for grinding and crushing food. In cardiology, cusps relate to the points or leaflets forming the heart valves, allowing blood flow in one direction while preventing backflow.
In astronomy, cusps pertain to the points of transition between day and night on a celestial body or the terminator line on the moon, dividing the illuminated and dark portions.
As cusps vary depending on the context, the word's definition can be tailored to suit specific disciplines, but its essence lies in describing pointed or rounded protrusions, bends, or transitions on various objects or surfaces.
The word "cusps" originated from the Latin word "cuspis", which means "point" or "spike". It was derived from the Proto-Indo-European root "*kups-", meaning "to prick" or "to stab". This root also gave rise to related words such as "cusp" and "cuspate". In English, "cusps" typically refers to the pointed ends or tips of curved objects, such as teeth or crescent shapes.
