residualfeatures
nounUK /rɪˈzɪdjuəl ˈfiːtʃəz/
US /rɪˈzɪdʒuəl ˈfiːtʃərz/
Small parts or marks that are left over after the main thing is gone.
The old map still showed residual features of the river that dried up long ago.
OTHER MEANINGS
2. In geology, small shapes or marks in rock that are left from an earlier time.
The scientist studied residual features in the stone to learn about ancient water flow.
3. In language, old bits of a word that stay even after the word changes.
The silent 'k' in 'knight' is a residual feature from how people used to say it.
4. In technology, small leftover parts of an image or signal after the main part is removed.
The software cleaned up residual features so the picture looked smooth.