Opistho-thelae
plural noun
Opis·tho-the·lae
in some classifications
: a large suborder of Araneae containing spiders that have nonsegmented abdomens and the first pair of spinnerets unbranched compare liphistiomorphae
Word History
Etymology
New Latin, from opisth- + -thelae (from Greek -thēlai, from thēlē nipple)