A peltate leaf is a type of leaf where the stalk is attached to the center of the blade rather than at the base or margin. Synonyms for peltate leaf include shield-shaped leaf, umbrella leaf, discoid leaf, and circinate leaf. Shield-shaped leaves are round with the petiole attached to the center, while umbrella leaves are concave, resembling a shallow bowl. Discoid leaves are flat, round shapes with a prominent central vein, while circinate leaves are coiled in a spiral shape. The use of synonyms allows for more precise communication about the specific type of leaf being discussed in various fields such as botany and agriculture.