Antonyms of adj caducous

1 sense of caducous

Sense 1
caducous (vs. persistent), shed -- (shed at an early stage of development; "most amphibians have caducous gills"; "the caducous calyx of a poppy")

persistent (vs. caducous), lasting -- (retained; not shed; "persistent leaves remain attached past maturity"; "the persistent gills of fishes")

Similarity of adj caducous

1 sense of caducous

Sense 1
caducous (vs. persistent), shed -- (shed at an early stage of development; "most amphibians have caducous gills"; "the caducous calyx of a poppy")
       => deciduous -- ((of teeth, antlers, etc.) being shed at the end of a period of growth; "deciduous teeth")