The term 'SED QUENCHER' is a combination of two words, 'SED' and 'QUENCHER'. The first word, 'SED', is an acronym for 'Stress-Energy-Dissipation', which is a type of engineering analysis used to study the behavior of materials under stress. The second word, 'QUENCHER', refers to a substance that is used to reduce or eliminate the effects of heat on a material. In this case, the crossword solution for the term is 'AGUA', which is the Spanish word for water. Water is often used as a quencher in engineering applications, as it can absorb and dissipate heat quickly. Therefore, the term 'SED QUENCHER' can be defined as a substance, such as water, that is used to reduce or eliminate the effects of stress and heat on a material.