la

Multiple Entries:
  la    LA    La    lah    lanthanum  

Concise Oxford English Dictionary © 2008 Oxford University Press:
la

▶noun Music variant spelling of lah.

Concise Oxford English Dictionary © 2008 Oxford University Press:
LA/elˈeɪ/

▶abbreviation

• 1 Library Association.

• 2 Los Angeles.

• 3 Louisiana (in official postal use).

Concise Oxford English Dictionary © 2008 Oxford University Press:
La

▶abbreviation (La.) Louisiana. ▶symbol the chemical element lanthanum.

Concise Oxford English Dictionary © 2008 Oxford University Press:
lah /lɑː/ (also la)

▶noun Music (in tonic sol-fa) the sixth note of a major scale.

■ the note A in the fixed-doh system.

– origin ME: representing (as an arbitrary name for the note) the first syllable of L. labii, taken from a Latin hymn.

Concise Oxford English Dictionary © 2008 Oxford University Press:
lanthanum /ˈlanθənəm/

▶noun the chemical element of atomic number 57, a silvery-white rare-earth metal. (Symbol: La)

– origin C19: from Gk lanthanein ‘escape notice’ (because it was long undetected in cerium oxide) + -um.