They are called "jack studs" above the opening and "king studs" below the opening. These studs help support the header above the opening in a framed wall structure.
The opening at the top of a volcano is called a crater. It is where volcanic eruptions typically occur.
glottis
That is a "cave."
That is called the anus, the opening where fecal matter exits the body. The majority of animals have that or something similar. Birds and at least one mammal have a cloaca instead, and that is an opening for urination, defecation, mating, and laying eggs.
The musical opening is called an overture. It starts with the letter O.
Opening Bids starting with a T is known as a Tender
A salutation is a greeting, or the opening line of a letter, such as... Dear Sir,
Open
it is called in media res which means in the middle of
The opening greeting of a business letter, or a personal letter is a colon, for example: Dear you: As for a friendly letter would be: Dear You,
The opposite of not opening is opening. Eight-letter synonyms for opening, depending on context, include clearing, unlacing, exposing, starting
The opening of a volcano is called the vent.The opening of a volcano is called a vent.
It is called the hatchway. If it is a round opening, it is called a scuttle. If it is a square opening it is called a hatch. Depending on the vessel and the location they can be "dogged" open.
Both has same meaning, opening letter of credit establishing letter of credit once letter of credit is opened, credit is established.
The opening is called a stomata, which is regulated by two guard cells.
The opening of a volcano is called the caldera.