lamellipodium
noun
la·mel·li·po·di·um
| \ lə-ˌmel-i-ˈpō-dē-əm
\
\
plural lamellipodia\ -dē-ə
\
\
Medical Definition of lamellipodium
: any of the motile sheetlike cytoplasmic extensions characteristic of some migrating cells (as macrophages)