The Egyptian Foreign Minister, Mohamed Kamel Amr, said he has assured US Secretary of State John Kerry in a telephone call that the overthrow of President Mohamed Morsi had not been a military coup.
The definition of what happened in Egypt is important because the military overthrow of an elected leader would generally trigger economic sanctions and could entail cutting of vital US aid.
"The American side is a strategic partner for Egypt and the welfare of Egypt is important to them," said Amr, a career diplomat who tendered his resignation to Morsi on Tuesday but who remains in charge of Egypt's foreign ministry - at least until a new interim technocratic government is named.
"I hope that they read the situation in the right way, that this is not a military coup in any way. This was actually the overwhelming will of the people."
The Muslim Brotherhood tells ITV News they are against violence but will "pay the price of their blood" to restore their ousted president.
Egypt's army has named two further officials in the transitional government as its supporters and opponents vowed to stay on the streets.
There has been outrage in Egypt after 51 people were killed near an barracks where ousted President Mohamed Morsi is thought to be held.