plain

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plain

lacking in style; unadorned.

plain-bodied
said of a sheep with very few wrinkles.
plain quarters
a horse with fat, rounded hindquarters resembling those of a pig.
plain wool
when the crimp in the staple is barely visible.
References in periodicals archive ?
Compositional data also show that the surface of Piri Planitia is more enriched in water ice (shown in false color as blue) than the higher plateaus, which may indicate that Piri Planitia's surface is made of water ice bedrock, just beneath a layer of retreating methane ice.
One of these features is Namjyalma fossae, a 560 km-long graben on the edge of Tinatin Planitia.
Beagle 2 is heading for Isidis Planitia, north of the Martian equator where scientists believe there was once water.
They show Acidalia Planitia (top), Elysium Planitia and Syrtis Major Planum (center images), and the Tharsis volcanic region (bottom).
Planitia, probing the Martian surface and photographing its rocky environs.
The first step was to be an uncrewed Red Dragon spacecraft launch, also in 2020 and potentially landing somewhere in Arcadia Planitia.
gov/image-feature/jpl/pia22052/squiggles-in-hellas-planitia) Jet Propulsion Laboratory shared a photo of the lines, made in Mars' Hellas Planitia, that its Mars Reconnaissance Orbiter took as it was surveying the area - part of an almost 1,400-mile-wide impact basin on the planet's southern hemisphere that is the largest one ever found in the solar system.
The landing sites for "Ares 3" is on a Martian plain named Acidalia Planitia.
Images taken by the HiRISE camera on NASA's Mars Reconnaissance Orbiter, or MRO, and initially searched by Michael Croon of Trier, Germany, a former member of the European Space Agency's Mars Express operations team at the European Space Operations Centre, have identified clear evidence for the lander and convincing evidence for key entry and descent components on the surface of Mars within the expected landing area of Isidis Planitia, an impact basin close to the equator.
All four semi-finalist spots lie near each other on an equatorial plain in an area of Mars called Elysium Planitia.
Using a ground-piercing radar sensor aboard the Mars Reconnaissance Orbiter, a team of scientists created 3-D maps of an equatorial region known as Elysium Planitia and the channels that run underneath the plains.
An international team of researchers identified dozens of these geological bumps, some hundreds of meters wide, in satellite images of craters on Mars' Utopia Planitia.