algo

¹ American  

[al-goh] / ˈæl goʊ /

noun

Computers Informal.

1. algorithm.

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algo- ² American  

1. a combining form meaning “pain,” used in the formation of compound words.

   algophobia.

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algo- British  

combining form

1. denoting pain

   algometer

   algophobia

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Usage

What does algo- mean? Algo- is a combining form used like a prefix meaning “pain.” It is occasionally used in medical terms, especially in psychiatry and pathology.Algo- comes from the Greek álgos, meaning “pain.” Similar in meaning and use to algo- are odyno- and -odynia, which derive from odýnē, also meaning “pain.”Corresponding forms of algo- combined to the end of words are -algia, as in ovarialgia, or -algy, as in coxalgy. Learn more about these forms in our Words That Use articles for each.

Etymology

Origin of algo¹

First recorded in 1990–95; by shortening

Origin of algo-²

Combining form representing Greek álgos

Example Sentences

Historically, the market has awarded firms with a lower risk profile, or lower beta, a higher P/E for a given algo.

From Barron's • Jan. 9, 2026

“Es algo que no habíamos sentido en todo el año”.

From Los Angeles Times • Sep. 30, 2025

Y “una vez que se propone algo, le entra con mucha seriedad”.

From Science Magazine • May 8, 2024

“Me decía si había dicho algo que no era del todo correcto”, explica.

From New York Times • Sep. 22, 2023

"Pregúntale si quiere algo para tomar," Papá said, bowing his head and smiling.

From "Breaking Through" by Francisco Jiménez