Trichome October 14, 2016 thcscience_admin Small ear-like projection from the base of a leaf or petal For other uses, see Auricle (disambiguation). Two species of cyclamen: without auricle (left); with auricles at bases of petals (right) In botany, an auricle is a small ear-like projection from the base of a leaf or petal. References[edit] Dictionary of Botany