noun
partial melting; partial fusion
Technical term used in geology, materials science, and related fields to describe the process where only a portion of a solid material melts.
マントルの部分溶融によってマグマが生成される。
Magma is generated by partial melting of the mantle.
この合金は部分溶融を利用して接合される。
This alloy is joined using partial fusion.
Compound of 部分 (ぶぶん, 'part' or 'partial') and 溶融 (ようゆう, 'melting' or 'fusion'). The exact historical derivation is uncertain, but the term is a straightforward technical compound.