Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
thermograph is a noun meaning "medical instrument that uses an infrared camera to reveal temperature variations on the surface of the body". It carries 2 recorded senses.
medical instrument that uses an infrared camera to reveal temperature variations on the surface of the body
a thermometer that records temperature variations on a graph as a function of time
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 thermograph come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.