By Anne Marie Helmenstine, Ph.D. Primary Standard Definition: A primary standard is a reagent which is very pure, representative of the number of moles the substance contains and easily weighed. Primary standards are typically used in titrations and other analysis techniques as standardization solutions.rimary Standard Definition: A primary standard is a reagent which is very pure, representative of the number of moles the substance contains and easily weighed.
fallo m (plural fallos) failure; verdict, decision; ruling; Verb . fallo. First-person singular present indicative form of fallar.
Pato. A term used in Mexico, Nicaragua, Panama, Peru, Puerto Rico, Venezuela and Cuba to insult gay men. As in other terms, to explain the origin of this use of the word alludes to gait duck or more eschatological animal issues.