From poly- + thalamus + -ous. <span class="searchmatch">polythalamous</span> (comparative more <span class="searchmatch">polythalamous</span>, superlative most <span class="searchmatch">polythalamous</span>) (zoology) Having many chambers. The shells...
polytetrafluoroethylene polythalamaceous Polythalamian polythalamic <span class="searchmatch">polythalamous</span> polythecium polytheism polytheist polytheistic polytheistical polytheistically...