Ex scientia tridens
“From knowledge, sea power.”
Motto of the United States Naval Academy
What does “Ex scientia tridens” mean?
Ex scientia tridens translates as “From knowledge, sea power.”
The trident, Neptune’s emblem, stands for command of the sea, and the motto says such power is built on knowledge. Strength rests on learning and skill.
“Ex scientia tridens” word by word
| Latin | English | Grammar |
|---|---|---|
| Ex | from, out of | preposition taking the ablative case; here it means “from” in the sense of “as a result of” |
| scientia | knowledge | ablative singular of scientia (feminine noun), “knowledge”; the case required by ex |
| tridens | trident, sea power | nominative singular of tridens (a noun from tres and dens, “three teeth”); the thing that comes from knowledge. It stands for naval power |
How to pronounce “Ex scientia tridens”
The two differ mainly in scientia: Classical has a hard k sound and a t (skee-EN-tee-ah), Church has sh and ts (shee-EN-tsee-ah). Stress falls on the third syllable of scientia and the first of tridens in both.
The story behind it
Word for word the motto says “from knowledge, a trident”. The trident is the three-pronged spear of Neptune, the Roman god of the sea, so it works as shorthand for mastery of the sea.
It is the motto of the United States Naval Academy at Annapolis, which trains officers for the U.S. Navy and Marine Corps. It is a modern motto written in Latin, not a line from an ancient author.
The message is that sea power does not come from ships and guns alone. It rests on education, training and skill. That makes the phrase fit for schools and maritime institutions as well as for the Navy.
How to use “Ex scientia tridens”
Fits a naval or maritime graduation gift, an academy plaque, or a personal motto for anyone who links strength to study. It also suits a sailor’s tattoo that points to skill rather than force.
- Latin
- Ex scientia tridens
- English
- From knowledge, sea power.
- Source
- Motto of the United States Naval Academy
- Era
- Modern Latin
- Theme
- Learning
Common mistakes
- It is not a quote from a Roman author. It is a modern motto, so do not credit it to Virgil, Cicero or anyone else in antiquity.
- Tridens is the subject, not the object. Reading it as “from the trident, knowledge” reverses the meaning.
- Scientia means knowledge or learning in a broad sense, not “science” in the modern lab sense, although the English word comes from it.
- The phrase is the Naval Academy’s motto, so using it on official-looking items can suggest a link to the Academy.
Questions about “Ex scientia tridens”
What does “Ex scientia tridens” mean?
“From knowledge, sea power.” The trident stands for command of the sea, and the motto says that power grows out of knowledge and skill.
Who uses “Ex scientia tridens” as a motto?
It is the motto of the United States Naval Academy at Annapolis, Maryland.
Why is a trident used for sea power?
The trident is the three-pronged spear of Neptune, the Roman god of the sea, and it became a common emblem of naval strength.
How do you pronounce “Ex scientia tridens”?
In Classical Latin: eks skee-EN-tee-ah TREE-dens. In Church Latin the middle word sounds like shee-EN-tsee-ah.
More to explore
Translation and grammar checked by Latin Quoter · last reviewed November 2026
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