sextant
UK: ˈsekstənt | US: ˈsekstənt
n. a navigational instrument used to measure the angular distance between celestial objects and the horizon, primarily for determining latitude at sea.
sextant = sext<six> + ant<noun suffix>
- sext<six>: From Latin sextus (sixth), derived from sex (six). Reflects the instrument’s arc of 60 degrees (1/6 of a circle).
- ant<noun suffix>: A suffix forming nouns, often denoting instruments or agents (e.g., pendant, stimulant).
Etymology Origin:
The word sextant originates from the Latin sextans (a sixth part), referencing the instrument’s 60-degree arc. Developed in the 18th century, it improved upon earlier navigational tools like the quadrant (90-degree arc). The name highlights its geometric precision, essential for celestial navigation.
The sailor used a sextant to calculate the ship’s position under the stars.
Modern GPS has largely replaced the sextant in navigation.
Learning to use a sextant requires understanding basic astronomy.
The antique sextant in the museum was once vital for transatlantic voyages.
Without a sextant, early explorers relied heavily on dead reckoning.