The Free On-line Dictionary of Computing (30 December 2018):

IEEE 802.3
802.3

    The IEEE standard defining the hardware layer
   and transport layer of (a varient of) Ethernet.  The
   maximum segment length is 500m and the maximum total length
   is 2.5km.  The maximum number of hosts is 1024.

   The maximum packet size is 1518 bytes.  If the upper layer
   protocol submits a PDU less than 64 bytes, 802.3 will pad
   the LLC Info field to achieve the minimum 64 bytes.

   Although it is not technically correct, the terms "packet"
   and frame are used interchangeably.  The ISO/IEC 8802-3
   ANSI/IEEE 802.3 Standards refer to MAC sub-layer
   frames consisting of the Destination Address, Source
   Address, Length, LLC Info., and FCS fields.  The Preamble
   and SFD are (usually) considered a header to the MAC
   Frame.  This header plus the MAC Frame constitute a "Packet".

   (1995-07-09)