underside

Apart from subtle differences in body size and vocalizations, it closely resembles other gentoos, with the familiar white underside and black back that help penguins avoid predators and hunt prey in the ocean.

From Science Daily ● Sep. 22, 2026

The snakes are named for their distinctive yellow underside, which contrasts dramatically with their darker top half.

From Los Angeles Times ● Sep. 17, 2026

In Grenen, the northernmost point in Denmark, Ms. Korsgaard lies in the sand on her belly to inspect the lyrically named green hairstreak, its wings “jade green on the underside, with a metallic sheen.”

From The Wall Street Journal ● Sep. 11, 2026

Every humpback has a pattern on the underside of their tail -- or fluke -- that is unique "like a human fingerprint", Castro said.

From Barron's ● May 20, 2026

She then licks her thumb and brushes it against the underside of my eye, wiping away any lingering sleep crust.

From "Kwame Crashes the Underworld" by Craig Kofi Farmer

Analysis has shown Punk and Emo had smooth undersides, indicating they likely lived on the seabed.

From BBC ● Jan. 10, 2025

Aescape has heated “hands,” which look like giant pads with touch points on their undersides.

From Los Angeles Times ● Dec. 3, 2024

Certain species, like the pythons, have specialized muscles that connect their ribs directly to their skin, allowing them to use just the skin on their undersides to push against the ground and move forward.

From Slate ● Mar. 8, 2024

Trilobites and other arthropods have rows of dorsal exoskeletal plates on their back and undersides.

From Science Daily ● Dec. 21, 2023

And he dawdled as the clouds turned their mackerel undersides to him and the cool of the late afternoon started to settle in over the town.

From "Lizzie Bright and the Buckminster Boy" by Gary D. Schmidt