From pre- + basic. <span class="searchmatch">prebasic</span> (not comparable) Prior to the development of basic plumage <span class="searchmatch">prebasic</span> molt / <span class="searchmatch">prebasic</span> moult...
multibasic nonbasic octabasic oligobasic pentabasic polybasic postbasic <span class="searchmatch">prebasic</span> quadribasic sesquibasic superbasic terbasic tetrabasic tribasic ultrabasic...