Semi key dates are hard to get coins in a series, but aren't the rarest in their series.
For example, with Mercury dimes, the 1916-D is the key date, they only made 264,000 of them, even well worn 1916-D Mercury dimes sell for hundreds of dollars.
On the other hand, the 1921 Mercury dime is considered to be one of the semi-key dates, they made about 1.2 million of them and in average condition you can pick one up for about $30 or so.
Semi-key dates sell for more than a common date coin. For example, a Mercury dime that is in average circulated condition sells for about $3 or so. However, a semi-key date like the 1921 would never sell for that low (if the dealer knows about them). So while semi-key dates aren't going to make you rich if you find one, they are worth quite a bit more than just an average coin.
It means that in a specific set or type of coins, it's one of the relatively rare specimens, but not quite the rarest. An example of a semi-key coin is the 1915-D buffalo nickel, with only 7.5 million minted. It's rare compared to the 1919-P at 60.8 million, but not as rare as the 1915-S with only 1.5 million.
DC stands for Deep Cameo, which is a term to describe the quality of proof coins.
Semi-quadrant
It refers to the "date of last activity" on an account; for example, when the account was charged off.
The one that relates to collecting coins
Kissing or going out on a date.
It means that in a specific set or type of coins, it's one of the relatively rare specimens, but not quite the rarest. An example of a semi-key coin is the 1915-D buffalo nickel, with only 7.5 million minted. It's rare compared to the 1919-P at 60.8 million, but not as rare as the 1915-S with only 1.5 million.
There are a few meanings to the term dough. It can mean cash, unbaked bread, or a soft moldable semi gooey substance.
You'll have to explain to me what you mean by "super semi"... been driving them for 12 years now, including combinations of up to 21 axles, and this term is a new one to me.
DC stands for Deep Cameo, which is a term to describe the quality of proof coins.
In earlier years, when a die which was being used to mint coins became worn so the date did not appear clear, the workers at the mint would "repunch" the date, meaning they would take punch tools with the numbers of the date and try to make the date clearer on the die. Sometimes called "recut" the more common term is "repunched". This practice was also applied to mint marks which were getting worn from use.
It used to mean one who passes counterfeit coins, but the term is now obsolete.
Periodic mean after a period like weekly, monthly, semi anually, quartrly etc.
It may be a meaningless term that includes full and semi auto. As real repeaters are lever action.
It is a semi religious term relating to a purificatory ceremony or rite (of passage) marking a major event in one's life
A semi-circle.