heat of fusion (noun)

1. The heat of fusion between them was undeniable - their love for each other melted their hearts and brought them closer.

2. In the cartoon, the character's excitement caused the heat of fusion to turn ice into a flowing river of water.

3. The heat of fusion symbolizes the divine transformation of the soul from a solid state to a liquid state in religious texts.

4. The author beautifully described the character's transformation using the metaphor of heat of fusion, illustrating how she melted away her troubles and became a new person.