冰点是指什么？

正常结冰是零度，水在0摄氏度以下由液态凝聚为固体状态，称其为结冰。需要注意的是：0度是结冰点。没有杂质0度就会结冰，有杂质要0度以下才结冰，大约零下3度左右。

冰点是指水的凝固点，即水由液态变为固态的温度。在标准大气压下温度是0℃，标准温度和水的杂质有关系，但是有杂质的水不能算标准的冰点。凝固点和熔点是同义词，指的是物质在液态和固态共存时的温度，或者说是物质在液态和固态之间转换时的温度。只有水的凝固点或熔点叫做冰点，别的物质的凝固点或熔点不能叫冰点。

冰点也称凝固点,即物体固液转变的温度点,会受到外界条件的影响（如大气压）,在英语中称为freezing point（凝固点另有solidifying point)

google有定义引擎搜索如下

The temperature at which a liquid solidifies under the influence of a particular set of conditions.

Temperature at which a liquid solidifies under any given set of conditions.It may or may not be the same as the melting point or the more rigidly defined true freezing point or (for water) ice point.

The temperature at which a substance goes from the liquid phase to the solid phase.

The temperature at which a material freezes.(See also Melting Point).

The temperature at which the first crystal of ice appears during freezing,this can be the same temperature as the melting point,however water and aqueous solutions have a tendency to supercool and ice formation can be delayed to temperatures significantly below the melting point.For example in carefully controlled conditions water may be cooled to -40°C before ice nucleation becomes inevitable.

Temperature at which a liquid becomes a solid,at normal atmospheric pressure

Whe the processes of freezing and thawing are in equilibrium

the temperature below which a liquid turns into a solid

The melting point of a solid is the temperature at which it changes state from solid to liquid.

宗上所述,大多数定义把冰点freezing point定义为

物质由液体转化为固体时的温度

或 物质由固体转化为液体时的温度

但会收到大气压的影响

通常冰点在国内化学上被成为凝固点（较书面化,因为冰是水的固态形式）,按中文字面直解即可理解为物质由固到液的临界点

但若在日常生活中所说的“冰点”通常指代气温下降到了零度以下

若有要求需要严谨的解释做为回答,可查阅新华词典的标准定义.

1摄氏度等于1.8华氏度 摄氏温度与华氏温度的换算式是： 5（F- 50�0�2）= 9(C-10�0�2) 式中F=华氏温度

体温的37摄氏度=98.6华氏度

华氏℉（Fahrenheit）=℃×9/5+32.摄氏℃(Celsius or Centigrade)=5/9×(℉-32).

体温的37摄氏度=98.6华氏度

两种方法计算结果都是一样的。

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