Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
tangency is a noun meaning "the state of being tangent; having contact at a single point or along a line without crossing". It carries 2 recorded senses.
the state of being tangent; having contact at a single point or along a line without crossing
(electronics) a junction where things (as two electrical conductors) touch or are in physical contact
“they forget to solder the contacts”
electronics
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for tangency come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.