| Modularity - | (Software Engineering) an attribute of a design that leads to the creation of high quality program components |
| Magnetite | (Concrete Engineering) An aggregate used in heavy weight concrete, consisting primarily of ferrous metaferrite (Fe304). A black magnetic iron ore with a specific gravity of approximately 5.2 and a Mohs hardness of about 6. |
| Mass Curing | (Concrete Engineering) Adiabatic curing, using sealed containers. |
| Maximum Size Aggregate | (Concrete Engineering) Aggregate whose largest particle size is present in sufficient quantity to affect the physical properties of concrete; generally designated by the sieve size on which the maximum amount permitted to be retained is 5 or 10 percent by weight. |
| Mixing Speed | (Concrete Engineering) Rate of mixer drum rotation or that of the paddles in a pan, open-top, or trough type mixer, when mixing a batch; expressed in revolutions per minute (rpm) or in peripheral] feet per minute of A point on the circumference at maximum diameter. |
| Moist Room | (Concrete Engineering) A room used for storing and curing cementitious test specimens. The atmosphere of this room is maintained at a temperature of 73.4 3.0'F or 23.0*1.7'0 and relative humidity of at least 98 percent. These facilities must be adequate to continually maintain free moisture on the exteriors of test specimens. |
| machine tool | เครื่องมือประเภทเครื่องใส, เจาะ, กลึง, คว้าน ฯลฯ |
| machinist | ช่างผู้ควบคุมเครื่องจักร |
| macrame | ศิลปะการผูกเชือกเป็นปุ่มเพื่อใช้ในการตกแต่ง ทำกันมาตั้งแต่โบราณแล้ว มีลวดลายต่างๆตามแบบเรขาคณิต |
| magenta | สีม่วง |