mole

n 1: the molecular weight of a substance expressed in grams; the

basic unit of amount of substance adopted under the

System International d'Unites [syn: {gram molecule}, {mol}]

2: a spy who works against enemy espionage [syn: {counterspy}]

3: (Mexican) spicy sauce often containing chocolate

4: a small congenital pigmented spot on the skin

5: a protective structure of stone or concrete; extends from

shore into the water to prevent a beach from washing away

[syn: {breakwater}, {groin}, {groyne}, {bulwark}, {seawall},

{jetty}]

6: small velvety-furred burrowing mammal having small eyes and

fossorial forefeet

hole

The absence of an {electron} in a

{semiconductor} material. In the {electron model}, a hole can

be thought of as an incomplete outer electron shell in a

doping substance. Holes can also be thought of as positive

charge carriers; while this is in a sense a fiction, it is a

useful abstraction.

(1995-10-06)