Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
shield-shaped is an adjective meaning "(of a leaf shape) round, with the stem attached near the center of the lower surface rather than the margin (as a nasturtium leaf for example)". It carries one recorded sense.
Definitions, synonyms and semantic relations for shield-shaped come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.