Learn how to say Plectrums correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word plectrum:
noun (plural plectrums or plectra /-trə/)
a thin flat piece of plastic, tortoiseshell, or other slightly flexible material held by or worn on the fingers and used to pluck the strings of a musical instrument such as a guitar.
the mechanical part corresponding to a plectrum which plucks the strings of an instrument such as a harpsichord.
late Middle English: via Latin from Greek plēktron ‘something with which to strike’, from plēssein ‘to strike’