1. Possessing a symmetrical tail that extends beyond the end of the vertebral column (as in most bony fishes)

Antonym: heterocercal

• unbidden
• unbigoted
• unbind
• unbitter
• unbleached
• unblemished
• unblended
• unblessed
• unblinking
• unblinkingly
• unblock
• unbloody
• unblushing
• unblushingly
• unbodied
• unbolt
• unbolted
• unbooked
• unbordered
• unborn
• unbosom
• unbound
• unbounded
• unbounded interval
• unboundedness