Definitions

1. adjective

relating to or situated under a glacier or ice sheet

“The subglacial lake was discovered by satellite imaging.”

2. noun

the area or region under a glacier or ice sheet

“The subglacial terrain was mapped by a team of geologists.”

3. adverb

in a way that is related to or situated under a glacier or ice sheet

“The subglacial water flowed rapidly through the tunnel.”