名詞 diffusion:

1. (physics) the process of diffusing; the intermingling of molecules in gases and liquids as a result of random thermal agitation
2. the spread of social institutions (and myths and skills) from one society to another
3. the property of being diffused or dispersed
   同義詞：dissemination
4. the act of dispersing or diffusing something
   同義詞：dispersion, dispersal, dissemination

1. Insulation used to prevent heat diffusion, as from a steam pipe.
   絕熱材料用來防止熱量散失的絕熱材料，如從蒸汽輸送管上

dif.fu.sion

n.（名詞）
The process of diffusing or the condition of being diffused.
擴散：擴散的過程或擴散的條件
Needless profusion of words; prolixity.
冗長：沒完沒了有好多話；冗長而羅嗦
Physics
【物理學】
The scattering of incident light by reflection from a rough surface.
漫射：入射光線在粗糙表面的反射下分散
The transmission of light through a translucent material.
透射：光在半透明材料中透射
The spontaneous intermingling of the particles of two or more substances as a result of random thermal motion.
分子擴散運動：兩種或更多種物質的分子由于隨機的熱運動自發(fā)混合在一起

【引伸】
diffu.sional
adj.（形容詞）