1) Third molar 2) Type of tooth 
A wisdom tooth or third molar is one of the three molars per quadrant of the human dentition. It is the most posterior (most distal) of the three. Wisdom teeth generally appear between the ages of 17 and 25. Most adults have four wisdom teeth (a third molar in each of the four quadrants), but it is possible to have fewer or more, in which case the...
Another name for the third molar
The last tooth to come in at the back of each side of the upper and lower jaws. These teeth usually come in between 17 and 23 years of age, but not everyone has them. Also called third molar.
the third molar; the eighth tooth from the center of mouth.
These are the last teeth to erupt into the mouth and they usually appears around age 18, which is how they got their name. Wisdom teeth are often impacted (obstructed from erupting), and are usually extracted.
<dentistry> Another name for the third molar. ... (08 Jan 1998) ... 
The eighth (also the last tooth) tooth from the middle of the jaw.
Type: Term Synonyms: third molar tooth
Wisdom tooth: See: Tooth, wisdom.
[n] - any of the last 4 teeth on each side of the upper and lower jaw
noun any of the last 4 teeth on each side of the upper and lower jaw; the last of the permanent teeth to erupt (between ages 16 and 21)
The third molar, this is the eighth tooth from the center of mouth to the back of the mouth. wisdom teeth are often impacted (obstructed from erupting) and have to be extracted.