I. Cow is formed as follows:

Buffalo? Old cow? bull? bull? Cow? Cow? Horns? Bull's head? Yellow cow? Milk? Cowhide? Dairy cow? Beef? Iron Cow

2. Definitions:

1. Mammal. Grass-fed, ruminant. Domestic cattle are yellow cattle, buffaloes and yaks. Yellow cattle are generally used for service and meat; buffalo is an important service animal for paddy field cultivation; yak can be used as a pack animal between the high mountains and steep ranges. China's yellow cattle are Qinchuan cattle, Nanyang cattle, Ruxi yellow cattle, Yanbian yellow cattle, etc.; buffaloes are Wenzhou buffaloes, Binhu buffaloes and other good breeds. A kind of bison produced in Yunnan is a national key protected animal in China.

2. Metaphorically speaking, it is also used to describe stubbornness and headstrongness, and also to describe authority and godliness: ～temperedness. ~ coaxing. He looks really ~.

3. Star name. One of the twenty-eight constellations.

4. Short for Newton.

Expanded information:

I. The evolution of the character:

Niu, the oracle bone is a hieroglyphic canonical character, the character resembles a line drawing of an animal's head, with nostrils protruding from the tip of the nose. The shape of the character "V" and a pair of sharp horns extending out to the sides in an arc.

Some of the oracle-bone inscriptions downplayed the image of the bull's nose. The gold script carries on the shape of the oracle bone characters. Seal script strengthens the vertical strokes in the middle, completely erasing the image of the bull's nose, and at the same time downplaying the image of the bull's horns. Character construction: noun, mammal, stout, with hollow horns, strong, capable of plowing fields and pulling carts.

Literary version of the Shuo Wen Jie Zi: Niu, a large animal. Cattle, pieces also; pieces, things also. Like the corner of the head of the three, sealing the tail of the shape. All the genus of cattle are from the cow.

The vernacular version of Shuowen Jiezi: Niu, large livestock. Niu, also means "piece"; piece, indicates the analysis of the matter. Like the shape of the horn head three, sealing the tail. All the characters related to the cow, all adopt "cow" as the side.

2. Phrase Interpretation:

1. Put the cattle [fàng niú]?

To loose the cattle and live where they go.

2. To plant cattle [zhòng niú]?

Cattle dedicated to breeding.

3, milk [niú nǎi]?

The mammary glands of cows secrete a white or slightly yellowish stream of juice that is used to feed their young, which contains various proportions of fat, protein, sugar, and inorganic salts that become suspended.

4, cowhide [niú pí]?

Cow's skin (mostly refers to have been tanned).

5, beef [niú ròu]?

The meat of castrated cows, dairy cows or other adult cattle slaughtered for consumption.

6, snail [wō niú]?

Mollusks, two pairs of tentacles on the head, eyes grow on the tip of the latter pair, the ventral surface has flattened feet, the shell is slightly round or oval, yellowish-brown, with spiral lines. Lives in moist areas and eats herbaceous plants. In some areas it is called buffalo child.

7, brisket [niú nǎn]?

〈方〉The muscle on the stomach and near the ribs of a cow. It also refers to dishes made from this meat. 腩（nǎn）.

8. downer cow [māng niú]?

Bull.

9, Newton [niú dùn]?

Isaac Newton (1642-1727) British physicist, astronomer and mathematician. His main contribution was to summarize Newton's laws of motion and the law of universal gravitation, which became the basis of classical mechanics.

10, bullock [gǔ niú]?

The bull.