Ethernet - (IEEE 802.3) - "A local-area network (LAN) architecture developed by Xerox Corporation in cooperation with DEC and Intel in 1976." (Reference - Wi-FiPlanet.com)

10Base-T -
10Base-T is a more common type of Ethernet Local Area Networking (LAN) cabling. It specifies 10 Mbps (baseband) can be  carried over twisted pair.
 

100Base-T
- (a.k.a. Fast Ethernet) -
100Base-T is a more common type of Ethernet Local Area Networking (LAN) cabling. It specifies that 100 Mbps (baseband) can be carried over twisted pair.

1000Base-T
- (Gigabit Ethernet, GigE) -
1000Base-T is a more common type of Ethernet Local Area Networking (LAN) cabling. It specifies that 1000 Mbps (baseband) can be carried over twisted pair.

Media Access Control (MAC, Media Access Controller) - Media Access Control controls the way multiple devices are accessed, both by the computer controlling them and outside devices.
(A) The lower sub layer of the data link layer in the open system interconnection (OSI) model. MAC is responsible for scheduling, gaining access, as well as transmitting and receiving data on the network media.
(B) A generic term for the way in which workstations gain access to transmission media.


802.3ah (Ethernet in the First Mile).

Ethernet Phone -
An Ethernet Phone is a phone plugs directly into an Ethernet network.