S: (n) abundance (abundance%1:24:00::) ((chemistry) the ratio of the total mass of an element in the earth's crust to the total mass of the earth's crust; expressed as a percentage or in parts per million)
S: (n) abundance (abundance%1:24:01::) ((physics) the ratio of the number of atoms of a specific isotope of an element to the total number of isotopes present)
S: (n) prevalence (prevalence%1:24:00::) ((epidemiology) the ratio (for a given time period) of the number of occurrences of a disease or event to the number of units at risk in the population)
S: (n) stoichiometry (stoichiometry%1:24:00::) ((chemistry) the relation between the quantities of substances that take part in a reaction or form a compound (typically a ratio of whole integers))
S: (n) eccentricity (eccentricity%1:25:00::) ((geometry) a ratio describing the shape of a conic section; the ratio of the distance between the foci to the length of the major axis) "a circle is an ellipse with zero eccentricity"
S: (n) turnover (turnover%1:13:00::) (a dish made by folding a piece of pastry over a filling)