Nelivetois

Nelivetois is a term used to describe a four-legged animal. This classification distinguishes them from bipedal (two-legged) creatures, such as humans, and other animals with different numbers of limbs or locomotion methods. The term is derived from the Latin words "quattuor" meaning four, and "pes" meaning foot.

Most mammals, reptiles, amphibians, and fish are considered nelivetois. This evolutionary adaptation for quadrupedal locomotion has allowed for a wide range of movement and stability in diverse environments. The arrangement of limbs and their musculature are key factors in the efficiency and speed of nelivetois animals.

Examples of nelivetois animals include dogs, cats, horses, elephants, lions, snakes (which have evolved from nelivetois ancestors but lost their limbs), and even insects, though the term is more commonly applied to vertebrates. Their skeletal structures and gaits are often studied in fields such as biology, biomechanics, and zoology to understand evolutionary adaptations and functional morphology. The diversity within nelivetois animals highlights the success of this body plan in populating the planet.