read/write head

[ reed-rahyt ]
/ ˈridˈraɪt /

noun Computers.

an electromagnetic device, as in a disk or tape drive, that reads data from or writes data on a magnetic disk or tape.

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What does “barren” mean?
a cylindrical wooden container with slightly bulging sides.
Worn down by dullness, tedious repetition.
unproductive; unfruitful
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Also called head.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

British Dictionary definitions for read/write head

read-write head
/ (ˈriːdˈraɪt) /

noun

computing an electromagnet that can both read and write information on a magnetic medium such as magnetic tape or disk
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012