abrasion
[ə'breiʒən]
n. 磨擦, 磨损, 磨损

[] 磨耗; 磨蚀

[医] 擦除, 擦伤; 磨损, 磨耗

[] 蚀损

1. An implement with cutting edges or a pointed end for boring holes in hard materials, usually by a rotating abrasion or repeated blows; a bit.
   钻带割刃端，坚硬材钻孔，般靠旋转磨损复击钻孔
2. A minor scratch or abrasion.
   擦伤微擦伤磨损
3. Poorly crystallized diamonds used for industrial cutting and abrasion.
   等金刚石晶很差金刚石，割研磨

abrasion
[ noun ]

1. an abraded area where the skin is torn or worn off

<noun.state>

2. erosion by friction

<noun.process>

3. the wearing down of rock particles by friction due to water or wind or ice

<noun.phenomenon>

Abrasion \Ab*ra"sion\, n. [L. abrasio, fr. abradere. See
{Abrade}.]
1. The act of abrading, wearing, or rubbing off; the wearing
away by friction; as, the abrasion of coins.

2. The substance rubbed off. --Berkeley.

3. (Med.) A superficial excoriation, with loss of substance
under the form of small shreds. --Dunglison.