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.
GCIDE (0.00 / 0 votes) Rate this definition: fellatio (n.). a form of sexual activity between two persons in which the penis of one is stimulated by the other's mouth, especially until orgasm is achieved. It is a form of oral sex.Compare cunnilingus.CIDE (0.00 / 0 votes) Rate this definition: fellatio (n.). a form of sexual activity between two persons in which the penis of one is stimulated by the other's mouth, especially until orgasm is achieved. It is a form of oral sex. Compare cunnilingus. The act is also called by the slang term blow job.