tibia

noun

tib·​ia ˈti-bē-ə 

plural tibiae ˈti-bē-ˌē  -bē-ˌī  also tibias

1

: the inner and usually larger of the two bones of the vertebrate hind or lower limb between the knee and ankle

2

: the fourth joint of the leg of an insect between the femur and tarsus

tibial

ˈti-bē-əl 

adjective

Examples of tibia in a Sentence

Recent Examples on the Web

To make turns, the ACL is tasked with providing stability to the angulation of the tibia and femur bones that are doing the turning. —Devon Henderson, New York Times, 4 Feb. 2026

Torquing and turning down a mountain at 85 miles per hour without an ACL – its sole anatomical purpose is to connect the femur to the tibia and protect the bones from shifting – is, at best, not recommended and, at worst, slightly reckless. —Dana O’Neil, CNN Money, 3 Feb. 2026

Although the 5,550-year-old middle-aged hunter-gatherer exhibited no visible signs of disease, researchers found traces of a previously unknown species of treponemes—bacteria that cause yaws, bejel, syphilis, and pinta—after analyzing extracted DNA from his tibia. —Maria Mocerino, Interesting Engineering, 24 Jan. 2026

The tibia and fibula form the socket for the ankle joint, while the talus is the ball. —Parker Gabriel, Denver Post, 19 Jan. 2026

Word History

Etymology

Latin

First Known Use

circa 1706, in the meaning defined at sense 1

Rhymes for tibia

• amphibia
• tibiae

Kids Definition

tibia

noun

tib·​ia ˈtib-ē-ə 

plural tibiae -ē-ˌē 

-ē-ˌī

also tibias

1

: the inner and usually larger of the two bones of the vertebrate leg that is located between the knee and the ankle

called also shinbone

2

: the fourth joint of the leg of an insect between the femur and the tarsus

tibial

-ē-əl 

adjective

Medical Definition

tibia

noun

tib·​ia ˈtib-ē-ə 

plural tibiae -ē-ˌē  -ē-ˌī  also tibias

: the inner and usually larger of the two bones of the leg between the knee and ankle that articulates above with the femur and below with the talus

called also shinbone