1
a
: the normal convex curvature of the cervical and lumbar regions of the spine
b
: abnormally exaggerated forward curvature of the lumbar and cervical regions of the spine resulting in a concave back when viewed from the side : hyperlordosis, swayback compare kyphosis
2
: a mating posture of some sexually receptive female mammals (such as rats) in which the head and rump are raised and the back is arched downward

Examples of lordosis in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
The spine bones are not joined in a simple straight line, but rather in a complex collection of the correct amount of sway to the front (kyphosis) and to the back (lordosis), a large majority of which depends on the spine’s connection to the pelvis. Richard Menger Md Mpa, Forbes, 17 Oct. 2024 For example, people with lumbar lordosis may find that stomach sleeping is uncomfortable, while people living with spondylitis or ankylosing spondylitis need to especially support their back. Sarah Bradley, Verywell Health, 5 Oct. 2023

Word History

Etymology

New Latin, from Greek lordōsis, from lordos curving forward; akin to Old English belyrtan to deceive

First Known Use

1704, in the meaning defined at sense 1b

Time Traveler
The first known use of lordosis was in 1704

Browse Nearby Words

Cite this Entry

“Lordosis.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/lordosis. Accessed 21 Mar. 2025.

Kids Definition

lordosis

noun
: abnormal curving of the lower part of the spine inward

Medical Definition

lordosis

noun
1
: the normal convex curvature of the cervical and lumbar regions of the spine
2
: abnormally exaggerated forward curvature of the lumbar and cervical regions of the spine resulting in a concave back when viewed from the side

called also swayback

compare kyphosis, scoliosis
lordotic adjective
lordotic posture

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