1. a combining form representing thyroid in the formation of compound words:




  1. thyroid



“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

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Example Sentences

The inner edges of the thyro-arytenoid muscles form the vocal cords.

It consists of a small basi-hyal, a pair of broad cerato-hyals, and a pair of strong thyro-hyals.

The hyoid is singular, there is a large flat basi-hyal prolonged laterally into two broad flattened thyro-hyals.

The thyro-hyals are ankylosed with the basi-hyal, which is connected with the large forked stylo-hyals by ligament only.

The hyoid consists of a broad basi-hyal, a long many-jointed anterior cornu and short thyro-hyals (fig. 72, 33).


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Words That Use Thyro-

What does thyro- mean?

Thyro- is a combining form used like a prefix representing the word thyroid. The thyroid gland is located in the neck and produces hormones regulating the body’s growth, development, and metabolism. It is often used in medical terms, especially in anatomy and pathology.

Thyro- comes from the Greek thyreoeidḗs, meaning “shield-shaped,” based on thyreós, a kind of oblong shield used by ancient Greek soldiers. Learn more about the origins of this word at our entry for thyroid.

What are variants of thyro-?

When combined with words or word elements that begin with a vowel, thyro- becomes thyr-, as in thyrosis.

Examples of thyro-

One example of a medical term that features the combining form thyro- is thyrotomy, “incision or splitting of the thyroid cartilage.”

The first part of the word, thyro-, means “thyroid.” The second part of the word, the combining form -tomy, means “incision.” Thyrotomy literally translates to “thyroid incision.”

What are some words that use the combining form thyro- or thyr-?

What are some other forms that thyro- or thyr- may be commonly confused with?

Not every word that begins with the exact letters thyr- is necessarily using the combining forming thyr- to denote “thyroid.” The botany term thyrsus or thyrse, for example, has a very different origin. Learn what a thrysus is at our entry for the word.

Break it down!

The combining form -tome means “cutting instrument.” With that in mind, what is a thyrotome?