n. A petiole dilated into the form of a blade, and usually with vertical edges, as in the Australian acacias.
the GNU version of the Collaborative International Dictionary of English
n. A petiole dilated into the form of a blade, and usually with vertical edges, as in the Australian acacias.
The Century Dictionary and Cyclopedia
n. In botany, a petiole which usurps the form and function of a leaf-blade, as in many species of Acacia.
Word Usage
"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."