Phthorimaea operculella phtho·ri·maeao·perculella uncommon noun 1. larva of potato moth; mines in leaves and stems of e.g. potatoes and tobacco Synonymspotato tuberwormPhthorimaea operculella 2. grayish-brown moth whose larva is the potato tuberworm Synonymspotato mothpotato tuber mothsplitwormPhthorimaea operculella Related words Broader terms gelechiidcaterpillar Parts Phthorimaea WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.