The gaps in the battlements of a castle are called crenels. Crenels are the lower places in the battlement where participants in a battle could fire arrows or other catapults at the enemy.
The battlements themselves are known as crenellations and the gaps within them are known as crenels or embrasures. Please see the related links.
Crenellations, also called battlements, are the defensive structures found on many castles. They consist of merlons (the higher parts which were used to hide behind) and crenels (the gaps you can use to shoot through).
teeth Or Battlements.
Battlements were/are part of the defenses of an fortified structure. They are the crenellations (evenly spaced gaps) in the top of a wall, or tower. They are designed to give defenders a chance to shoot bows (and later guns) or throw/drop things at the attacking force without exposing themselves to return fire.
A Vision of Battlements was created in 1965.
Gaps in rock layers are called unconformities.
Gaps that are now called kirkwood gaps
"Run along the battlements of the castle" ordered the commander to the archers.
If the space is filled with mortar, it's called a joint. If the gaps are horizontal, they're beds or lines. If they're vertical, they're perpends or perps. If the gap is left unfilled for the purpose of letting moisture out of the wall, it's called a weep hole. If it's the space between two leaves or wythes of a cavity wall, it's just called the cavity. If it's a hole in dry masonry, it's a smoot, a bolt hole or a cripple hole. If it's the gaps in the parapet of a battlement, it's called the crenel. Other gaps in battlements are referred to as embrasures. If you're looking out of it, it's called a window. If you're walking through it, it's an entry. If there's a door hung in it, it's a doorway.
Lubrication is filling in gaps using oil.
Perception is when you fill in the gaps with what your senses tell you.
They are called uncomformities.