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.
Dictionary entry overview: What does fall guy mean? â¢ FALL GUY (noun) The noun FALL GUY has 1 sense: 1. a person who is gullible and easy to take advantage of Familiarity information: FALL GUY used as a noun is very rare.