Literally meaning: “soil lump”
Origin: Anc Greek
βῶλος/volos(=lump, a small mass of soil)
masculine singular ending for nouns oς/os > latin- us, masculine singular for nouns
1. any roundish mass of medication larger than an ordinary pill that it is ready to shallow
2. a concentrated form of a medication or radioisotope administered in one dose intravenously.