Phalangium opilio pha·lan·giu·mopilio uncommon noun 1. spider-like arachnid with a small rounded body and very long thin legs Synonymsharvestmandaddy longlegsPhalangium opilio Related words Broader terms arachnid Parts Phalangium WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.
