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.
noun. 1  an unintelligent person; moron. 2  N. Used to refer to a police officer working at a mall.  3 momo is also a nickname.  1. The word Momo refers to motivation which is the reason or reasons one has for acting or behaving in a particular way.