moraine
UK[məˈreɪn]US[məˈreɪn]
n
a mass of rocks and earth carried and left by a glacier.
Etymology
the word 'moraine' entered english in the late 18th century from french, specifically from the savoyard dialect word 'morena', meaning "mound of earth." the french term likely derives from the vulgar latin 'murrum', meaning "rounded mass" or "rocky summit." this latin root is of pre-roman, possibly alpine, origin. the term was adopted into geological vocabulary to describe the distinctive ridges of debris deposited at the sides and end of glaciers, reflecting the physical characteristic of a piled-up mass.
Analysis
this word is a simplex loanword from french. it does not contain separable morphemes within its modern english spelling.
Examples
the hikers walked along the lateral moraine at the edge of the ancient glacier.
scientists study the composition of the terminal moraine to understand the glacier's historical reach.
the landscape was dotted with erratic boulders left behind by the retreating ice, now part of the ground moraine.