n. pl. 1. (Zool.) An order of Rhizopoda, in which the pseudopodia are thick and irregular in form, as in the Amœba. Webster's Revised Unabridged Dictionary.
Lobosa is a taxonomic group of amoebae possessing broad, bluntly rounded pseudopods. In current classification schemes, it is a subphylum of Amoebozoa.