What is the meaning of Sextans?

A Roman coin worth one sixth of an as.

a sixth part of an as,

  1. (a coin)
  2. (a weight)
  3. the sixth part of a juger (a measure of land)
  4. the sixth part of a sextarius (a measure of liquid)
  5. (a measure of length)

(a coin)

(a weight)

the sixth part of a juger (a measure of land)

the sixth part of a sextarius (a measure of liquid)

(a measure of length)

the sixth part of the number six (as of the numerus perfectus, in other words) unity, one

a sextant (nautical instrument)

Source: wiktionary.org