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.
Fellatio can be sexually arousing for participants, and may lead to orgasm and ejaculation of semen for males. It may be performed by a sexual partner as foreplay to create sexual arousal before other sexual activities (such as vaginal or anal intercourse), or as an erotic and physically intimate act in its own right.he English noun fellatio comes from fellÄtus, which in Latin is the past participle of the verb fellÄre, meaning to suck.