No, it is separated by a dots.
A compound noun is a noun that consists of two or more words, usually separated by dashes. The word caterpillar is not a compound noun.
Not really sure if it's what you're looking for, but an equation usually consists of two numerical expressions separated by an equal sign.
"Letters to the Editor" is usually a section of an old style Paper News Paper. Most news paper web sites have a link or Email address for this purpose. If it is going snail mail address it to "Letters To The Editor" at the news paper mailing address.
Memory usually consists of one or more chips of bytes.
A MAC address consists of 48 bits, usually represented as a string of 12 hexadecimal digits
The ecoregion is usually separated by the state boundaries and the separate political jurisdictions.
The return address of a business letter is the address of the sender. Business letters are usually written on letterhead which have the company name and address preprinted on the paper and if that's the case, it's not necessary to also write the return address on the letter. That is also true of envelopes that are preprinted with the company name and address.
No. They are separated by a semi-colon.
Lowercase letters in Genetics are usually used like Rr or rr, or RR. Lowercase letters usually represent a recessive trait.
Breakfast usually consists of a coffee and a light pastry.
Variables are usually writen as lower-case letters.Variables are usually written as letters, (x, y, z, etc.) or as Greek letters (theta, lambda, mu, etc.).
true