decap /diːˈkæp/ verb6 •To remove a cap. •To enzymatically remove a cap from mRNA. •To remove the epoxy from an integrated circuit. •To cause an armor-piercing shell to lose its hardened cap, degrading its ability to penetrate armor. •To change an uppercase letter to lowercase; to decapitalize.In English this pronoun is always written with a capital letter, while "you", the second person singular, which in Russian out of courtesy we spell with a capital, is decapped in English. — 1974 •To remove an upper limit.In October 1985 ARDC successfully decapped the AIF and was operating under the RDTE appropriation . — 1987 formsdecapped · decapping · decaps