Which term defines the length of leg and limb in rabbit terms?

The term that defines the length of leg and limb in rabbit terms is "Extension." In the context of rabbit anatomy, extension refers to the lengthening or stretching of the limbs, which is an important characteristic evaluated in assessing the overall conformation and physical structure of a rabbit. Proper limb extension is crucial for balance and movement, ensuring that the rabbit can move effectively and display its natural behaviors.

The other terms do not pertain to the measurement of limbs. "Entry" typically relates to access or introduction rather than physical dimensions. "Embryo" refers to the early developmental stage of an organism after fertilization, while "Elimination" relates to excretion or the removal of waste, neither of which has a connection to limb length. Thus, "Extension" is distinctly appropriate for describing limb proportions in rabbits.