<p><strong>Noun</strong></p><ul><li>An alkaloid, C₄₆H₅₆N₄O₁₀, derived from the periwinkle, Vinca rosea, used in the management of leukemias and lymphomas.</li><li>The oily or lower-melting fractions of a fat as distinguished from the solid or higher-melting constituents.</li></ul>