Marañón

American  

[mah-rah-nyawn] / ˌmɑ rɑˈnyɔn /

noun

1. a river in Peru, flowing N and then E, joining the Ucayali to form the Amazon. 1,000 miles (1,600 km) long.

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Marañón British  

/ maraˈɲɔn /

noun

1. a river in NE Peru, rising in the Andes and flowing northwest into the Ucayali River, forming the Amazon. Length: about 1450 km (900 miles)

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Example Sentences

These might be positive changes when it comes to caring for newborns, says Prof Susana Carmona, at the Gregorio Marañón Health Research Institute in Madrid.

From BBC • Mar. 4, 2026

She and her fellow activists won a landmark legal victory declaring the Marañón River a rights-bearing entity, and secured protections for its ecological integrity.

From Salon • May 28, 2025

“The patients are really, really desperate,” says Francisco Tejerina, an HIV researcher at Gregorio Marañón Hospital in Madrid, who has detected viral RNA in the stool, urine, and blood plasma of people with Long Covid.

From Science Magazine • Jun. 15, 2022

Gregorio Marañón, the Teatro Real’s president, said that he personally spoke with three Spanish ministers to help with the paperwork required for the British visitors.

From New York Times • Apr. 20, 2021

The latter demanded an account of Arqueros’s proceedings in the case; Arqueros presented documents which proved, by the complaints of many Indians, that Marañón deserved punishment.

From The Philippine Islands, 1493-1898—Volume 39 of 55 Explorations by Early Navigators, Descriptions of the Islands and Their Peoples, Their History and Records of The Catholic Missions, As Related in Contemporaneous Books and Manuscripts, Showing the Political, Economic, Commercial and Religious Conditions of Those Islands from Their Earliest Relations with European Nations to the Close of the Nineteenth Century, Volume XXXIX: 1683-1690 by Blair, Emma Helen