The oat, sometimes called the common oat, is a species of cereal grain grown for its seed, which is known by the same name. Oats are used for human consumption as oatmeal, including as steel cut oats or rolled oats. They appear to have been domesticated as a secondary crop as their seeds resembled those of other cereals closely enough for them to be included by early cultivators. Oats are a nutrient-rich food associated with lower blood cholesterol and reduced risk of human heart disease when consumed regularly. One of the most common uses of oats is as livestock feed; the crop can also be grown as groundcover and ploughed in as a green manure.

காடைக்கண்ணி (oat) என்பது கூலப் பயிராகும். இது மாந்தருக்குக் கூழாகவோ கஞ்சியாகவோ பயன்பட்டாலும் இதன் முதன்மையான பயன் கால்நடைகளுக்கான தீனியாகவே அமைகிறது. இது ஊட்டச் சத்து மிக்க குருதிக்கொழுப்பு குறைவான தொடர்ந்து உண்னத்தக்க உணவாகும்.