Аннотация:ISSN 1392-267XCognitive Terminology appeared as a continuation of previous stages of termi- nological studies and is based on the anthropocentric principle, attention to cognition and communication. This interdisciplinary and comprehensive appro- ach brings forth new objectives, foundations, methodology and procedures. They present a terminological meaning in relation to personal thoughts reflec- ting social, pragmatic and other extra-linguistic factors in knowledge structures according to cognitive mechanisms and categorization in the on-going inte- raction in specialized discourse. In discourse of modern technology, telecommunication, legal court communi- cation and discourse of clinical psychiatry nominative terminological units do- minate. They are shown in the paper on the basis of various cognitive mo- dels – propositions as part of cognitive-onomasiological modelling, image schemas, conceptual metonymy and metaphor, frames representing terminolo- gical systems as dynamic models of human cognition. The variability of con- cepts and the specificity of common and special knowledge conceptualization in terminological units functioning in professional discourse is biased with the answer to intricate questions of the perceptual and conceptual sources of term formation in interaction and terminological systems. KEYWORDS: terminological studies, a term, Cognitive Terminology study, special discourse, categorization, conceptualization, knowledge structures.