| geophysical engineering | วิศวกรรมธรณีเทคนิค |
| transportation engineering | วิศวกรรมขนส่ง |
| พระราชบัญญัติวิศวกร พ.ศ. 2542 | Engineering Act B.E. 1999 |
| Adsorption | (Environmental Engineering) A surface phenomena in which a solute (soluble material) concentrates or collects at a surface (the adsorbent). |
| Advanced wastewater treatment | (Environmental Engineering) The removal of any dissolved or suspended contaminants beyond secondary treatment, often this is the removal of the nutrients nitrogen and/or phosphorus. |
| Aerobes | (Environmental Engineering) Organisms which require molecular oxygen as an electron acceptor for energy production. See anaerobes. |
| Aerobic process | (Environmental Engineering) A process which requires molecular oxygen. |
| Alcohol | (Environmental Engineering) An organic compound with one or more hydroxyl "-OH" groups. |
| Aldehyde | (Environmental Engineering) An organic compound with a carbonyl at one end of a hydrocarbon group. |
| Alkalinity | (Environmental Engineering) The capacity of a water to neutralize acids. |