Zoology

From apes to zebras - the A-Z of zoology.

Upgrade to Britannica Online

Take a tour, New improved britannica online

Imagine Britannica's 32-volume encyclopedia online right there for you, plus full access to articles. Amazing content, written by world experts, that you can cite for projects and assignments.

Click here for Britannica shop

hog

Heavy, fat-producing domesticated pig developed in the U.S. in the late 19th and early 20th century. As the growing use of cheaper vegetable oils decreased the importance of lard as a source of fat, meatpackers sought hogs yielding more lean meat and less fat, and breeders (mostly European) began crossbreeding programs to obtain lean meat and vigorous animals. Today the term hog is often used for any pig weighing more than 120 lbs (54 kg).

Find more information on hog. Upgrade to Britannica Online for more on hog.

  • Britannica, just as colourful as Singapore
  • Singapore is a legendary city. Britannica has a legendary reputation for knowledge. With just a few clicks you can access all the quality information you can trust, online.