eutectic
Concise Oxford English Dictionary © 2008 Oxford University Press:
eutectic /juːˈtɛktɪk/
▶adjective Chemistry (of a mixture of two substances) having a distinct melting point which is lower than the melting points of the separate constituents.
– origin C19: from Gk eutēktos ‘easily melting’.
'eutectic' also found in these Oxford entries:

