calved

To give birth to a calf

To assist in a cow's giving birth to a calf

To give birth to (a calf)

(especially of an ice shelf, a glacier, an ice sheet, or even an iceberg) to shed a large piece, e.g. an iceberg or a smaller block of ice (coming off an iceberg)

“The glacier was starting to calve even as we watched.”

(especially of an iceberg) to break off

“The sea was dangerous because of icebergs calving off the nearby glacier.”

(especially of an ice shelf, a glacier, an ice sheet, or even an iceberg) to shed (a large piece, e.g. an iceberg); to set loose (a mass of ice), e.g. a block of ice (coming off an iceberg)

“The glacier was starting to calve an iceberg even as we watched.”