Glacier
noun
An ice river is some ice that moves (very slowly) like a river. That is a glacier. In fact, many inlets and sounds were created with glaciers, because glaciers moved through them like rivers... not very quickly, though.
The reading for 氷 is the one you didn't learn. Think of the glacier coming slowly to your door. It rings your doorbell and says heyo (ひょう). Note that the か becomes が here.
これは、氷河期に生きていたマンモスの化石です。
This is a fossil of a mammoth that lived during the glacial epoch.
ビエトは、氷河の写真をとるために、次のバケーションでアサバスカ氷河へ行く予定です。
Viet is planning to go to Athabasca Glacier for his next vacation to take glacier photos.
遠くのほうにキラキラと青く光る氷河が見えました。
I saw a glistening blue glacier in the distance.
地球温暖化のために、毎年溶けている氷河が増えている。
The number of melting glaciers has been increasing every year due to global warming.