1. Possessing a tail with the upper lobe larger than the lower and with the vertebral column prolonged into the upper lobe

Antonym: homocercal

• bird of paradise
• bird of passage
• bird of prey
• Bird Parker
• bird pepper
• bird sanctuary
• bird shot
• bird vetch
• bird watcher
• bird's eye view
• bird's foot
• bird's foot clover
• bird's foot trefoil
• bird's nest
• bird's nest fern
• bird's-eye
• bird's-eye bush
• bird's-eye maple
• bird's-foot fern
• bird's-foot violet
• bird's-nest fungus
• bird-footed dinosaur
• bird-on-the-wing
• bird-scarer
• birdbath