technology, trade or the arts to convey a concept peculiar to this particular activity.
So, bilingual, interdental, labialization, palatalization, glottal stop, descending scale are terms of theoretical phonetics.
There are several controversial problems in the field of terminology. The first is the puzzling question of whether a term loses its terminological status when it comes into common usage. Today this is a frequent occurrence, as various elements of the media of communication (TV, radio, popular magazines, science fiction, etc.) ply people with scraps of knowledge from different scientific fields, technology and the arts. It is quite natural that under the circumstances numerous terms pass into general usage without losing connection with their specific fields.
There are linguists in whose opinion terms are only those words which have retained their exclusiveness and are not known or recognised outside their specific sphere. From this point of view, words associated with the medical sphere, such as unit ("доза лекарственного препарата"), theatre ("операционная"), contact ("носитель инфекции") are no longer medical terms as they are in more or less common usage. The same is certainly true about names of diseases or medicines, with the exception of some rare or recent ones only known to medical men.
There is yet another point of view, according to which any terminological system is supposed to include all the words and word-groups conveying concept peculiar to a particular branch of knowledge, regardless of their exclusiveness. Modern research of various terminological systems has shown that there is no impenetrable wall between terminology and the general language system. To the contrary, terminologies seem to obey the same rules and laws as other vocabulary