| Answer | Crossword Clue |
|---|---|
| tailfin | a fin at the posterior end of a fish |
| tailfins | TAILFIN, a fin at the posterior end of a fish |
| cornicles | any of various small, horn-shaped processes, esp. one of a pair of tubes at the posterior end of the abdomen of aphids, from which a waxy fluid is emitted |
| cornicle | any of various small, horn-shaped processes, esp. one of a pair of tubes at the posterior end of the abdomen of aphids, from which a waxy fluid is emitted |
| cercus | either of a pair of simple or segmented appendages at the posterior end of various arthropods that usually act as sensory organs |
| cerci | either of a pair of simple or segmented appendages at the posterior end of various arthropods that usually act as sensory organs |
