caducous

Definitions of caducous
1

adj shed at an early stage of development

“most amphibians have caducous gills”
“the caducous calyx of a poppy”
Synonyms:
shed
deciduous
(of teeth, antlers, etc.) being shed at the end of a period of growth
Antonyms:
lasting, persistent
retained; not shed

Sign up, it's free!

Whether you're a student, an educator, or a lifelong learner, Vocabulary.com can put you on the path to systematic vocabulary improvement.