ASO, Titer. Antistreptolysin O (ASO) titer is a blood test used to help diagnose a current or past infection with Group A strep (Streptococcus pyogenes). It detects antibodies to streptolysin O, one of the many strep antigens. This test is rarely ordered now compared to thirty years ago.
A principal is an owner of all or a portion of a private company. A principal is the one who can sign legal documents on behalf of a company or designate an agent to do so on her behalf. A principal in a transaction is someone who has an ownership stake or vested interest in that transaction.he Term: Member or Principal. Legally, a person or business that owns a stake in a limited liability company is referred to as a member. Whenever you correspond with or submit any documentation to your state's secretary of state, you will need to use the term member when referring to the LLC's owners.
Princeton's WordNet(4.50 / 4 votes)Rate this definition: 1  principal(noun) the original amount of a debt on which interest is calculated. 2  principal, school principal, head teacher, head(noun) the educator who has executive authority for a school. 3  star, principal, lead(noun) an actor who plays a principal role.