lx

Multiple Entries:
  lx    lux    sixty  

Concise Oxford English Dictionary © 2008 Oxford University Press:
lx

▶abbreviation Physics lux.

Concise Oxford English Dictionary © 2008 Oxford University Press:
lux /lʌks/ (abbrev.: lx)

▶noun (pl. same) the SI unit of illuminance, equal to one lumen per square metre.

– origin C19: from L., lit. ‘light’.

Concise Oxford English Dictionary © 2008 Oxford University Press:
sixty/ˈsɪksti/

▶cardinal number (pl. sixties) the number equivalent to the product of six and ten; ten more than fifty; 60. (Roman numeral: lx or LX)

– derivatives
sixtieth ordinal number,
sixtyfold adjective & adverb.

– origin OE siextig (see six, -ty2).