Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
tinning is a noun meaning "the application of a thin layer of soft solder to the ends of wires before soldering them". It carries 2 recorded senses.
the application of a thin layer of soft solder to the ends of wires before soldering them
“careful tinning of the ends of wires results in a better joint when you solder them”
the application of a protective layer of tin
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 tinning come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.