Main Entry: ²label

Function: transitive verb

Inflected Form(s): la·beled or la·belled; la·bel·ing or la·bel·ling \ˈlā-b(ə-)liŋ\

1 : to distinguish (an element or atom) by using an isotope distinctive in some manner (as in mass or radioactivity) for tracing through chemical reactions or biological processes
2 : to distinguish (as a compound or cell) by introducing a traceable constituent (as a dye or labeled atom)