anacanthous
/ˌænəˈkænθəs/Definitions
1. adjective
Having no spines or thorns, or having spines that are reduced to small, soft, or inconspicuous points.
“The anacanthous flowers bloomed in the garden, their delicate petals a sight to behold.”
2. noun
A plant or animal that is anacanthous.
“The anacanthous species of the forest were studied by the team of scientists.”