From outer + web. <span class="searchmatch">outerweb</span> (plural <span class="searchmatch">outerwebs</span>) (ornithology) (of a plumage) an outer web 2010, Peter Clement, Ren Hathway, Thrushes[1]: Tail brown (except...
<span class="searchmatch">outerwebs</span> plural of <span class="searchmatch">outerweb</span>...
tail feathers have no or only avery little white at the base of the innerweb (12–18mm) which is in any case obscured by the uppertail-coverts. <span class="searchmatch">outerweb</span>...