ˈ ̷ ̷ˌ ̷ ̷ noun
( plural hare's-ears )
1. : a European annual herb ( Bupleurum rotundifolium ) with perfoliate leaves that resemble rabbit ears and small yellowish flowers
2. also hare's-ear mustard : a glabrous annual herb ( Conringia orientalis ) having sessile entire leaves with prominent basal lobes