Definition of "phyllodium" []

• A petiole dilated into the form of a blade, and usually with vertical edges, as in the Australian acacias. (noun)

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• "Martins proposes to apply the word 'cladodium' to such expansions, just as the term phyllodium is applied to the similar dilatation of the leaf-stalks."
• "To this species may perhaps be referred Cassia linearis of Cunningham MS., discovered by him in 1817, but which appears to differ in having a single prominent gland about the middle of its phyllodium: Bentham's plant being entirely eglandular."
• "Cassia phyllodinea is one of the very few species of the genus, which, like the far greater part of New Holland Acaciae lose their compound leaves, and are reduced to the footstalk, or phyllodium, as it is then called, and which generally becomes foliaceous by vertical compression and dilatation."