inadunate

I. \\|inə|d(y)ünə̇t, (ˈ)i|najən-\ adjective

Etymology: in- (I) + Latin adunatus, past participle of adunare to unite, from ad- + unus one — more at one

: not united; specifically : having the arms completely free from the calyx — used of a crinoid

II. noun (-s)

: an inadunate crinoid