Electrical connectors often come in two varieties that mate together; one is called the male connector, and one the female connector. Sometimes one is referred to as a plug, and the other a socket.
The only unambiguous way of using 'male' and 'female' is to use it to describe the arrangement of the conductive elements in the connectors. Thus the connector on a battery will almost always be a female connector, to reduce the risk of the pins shorting. The connector on a servo is a female connector, even though it is usually referred to as a plug and it goes into the male socket on the receiver.
However, this convention is not always adhered to.
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