Marie Curie is remembered for her discovery of radium and polonium, and her huge contribution to the fight against cancer. Born Maria Sklodowska on 7 November 1867 in Warsaw, Poland, she was the youngest of five children of poor school teachers.
Medical Definition of b.i.d. (on prescription) b.i.d. (on prescription): Seen on a prescription, b.i.d. means twice (two times) a day. It is an abbreviation for bis in die which in Latin means twice a day. The abbreviation b.i.d. is sometimes written without a period either in lower-case letters as bid or in capital letters as BID.
The abbreviation qid or q.i.d. is also sometimes written without a period in capital letters as QID. However it is written, it is one of a number of hallowed abbreviations of Latin terms that have been traditionally used in prescriptions to specify the frequency with which medicines should be taken. Other examples include: 1  q.d. ( 2 qd or QD) is once a day; q.d. 3  stands for quaque die (which means, in Latin, once a day). 4  b.i.d. ( 5 or bid or BID) is two times a day; b.i.d. 6  stands for bis in die (in Latin, 2 times a day). 7  t.i.d.