ThM

1 of 2

abbreviation (1)

master of theology

THM

2 of 2

abbreviation (2)

trihalomethane

Word History

Etymology

Abbreviation (1)

New Latin theologiae magister

Browse Nearby Words

THM

ThM

tho

See all Nearby Words

Cite this Entry

Style

“ThM.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ThM. Accessed 15 Feb. 2026.

Copy Citation

Medical Definition

THM

abbreviation

trihalomethane

Popular in Grammar & Usage

More Words You Always Have to Look Up

'Buck naked' or 'butt naked'?

What does 'etcetera' mean?

The Difference Between 'i.e.' and 'e.g.'

What’s the difference between ‘cemetery’ and ‘graveyard’?

Popular in Wordplay

ThM

abbreviation (1)

abbreviation (2)

Word History

Browse Nearby Words

Cite this Entry

Medical Definition

More from Merriam-Webster

Word of the Day

vertiginous

Popular in Grammar & Usage

More Words You Always Have to Look Up

'Buck naked' or 'butt naked'?

What does 'etcetera' mean?

The Difference Between 'i.e.' and 'e.g.'

What’s the difference between ‘cemetery’ and ‘graveyard’?

Popular in Wordplay

16 Glee-ridden Words from Schitt's Creek

Did Orange the Fruit or the Color Come First?

Why Is the Letter ‘Z’ Associated With Sleeping?

The Words of the Week - Feb. 13

Why do we call it 'ides of March'?

Popular

More Words You Always Have to Look Up

16 Glee-ridden Words from Schitt's Creek

Did Orange the Fruit or the Color Come First?

Games & Quizzes