pentacle /ˈpɛnt.ə.kl̩/ noun3 •A pentagram, especially one that is used for magical or mystical purposes.he drew a pentacle or five-pointed star. — 1949 •A circumscribed pentagram.A pentacle is a pentagram with a circle drawn around it. — 2006 •A flat talisman, almost always star-shaped, made of parchment, sheet metal, or other substance, marked with a magic symbol or symbols, used in magical evocation.of the same pentacles be certayne exorcizmes and names ineffable and carecters and signes of all the science, therefore, in them the whole science of all this art lyeth hydd — 1572 formspentacles