lib. (L. liber), a book.
Linn., Linnæus; Linnæan.
LL.B., (L. legum, of laws, and baccalaureus, bachelor), Bachelor of Laws, an academic title.
LL.D., (L. legum, of laws, and doctor, doctor), Doctor of Laws, an academic title, higher than LL.B.
long., longitude, E. or W.
L.S.D., or £ s. d. (said to be from L. libra, a balance, a pound in weight; solidus, a coin of the value of 25 denarii, subsequently only a half of that value; and denarius, a silver coin worth about 8½d. Eng.), pounds, shillings, pence—that is, in any written statement of money, L. is put over pounds, S. over shillings, and D. over pence; in printing, £ for L. is put before the sum, as £15, s. and d. in single letter, after, as 4s. 6d.
M.A. (L. magister artium), Master of Arts, an academic title.
M.C.S., Madras Civil Service.
M.D., (L. medicinæ, of medicine, doctor, doctor), Doctor of Medicine.