Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
diametric is an adjective meaning "related to or along a diameter". It carries 2 recorded senses.
characterized by opposite extremes; completely opposed
“in diametric contradiction to his claims”
“diametrical (or opposite) points of view”
“opposite meanings”
“extreme and indefensible polar positions”
Definitions, synonyms and semantic relations for diametric come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.