detectable

Etymology

It is formed from English detect + -able.^[2][3] The verb detect is from Latin dētectus, the past participle of dētegō (“to uncover, expose”), formed from dē- (“un-, off”) and tegō (“to cover”),^[3][2][4] from Proto-Indo-European *(s)teg- (“to cover”).^[3][4] The OED notes that a spelling with -ible would follow Latin models, though no such Latin adjective is recorded.^[2]

Earliest recorded meaning

Capable of being detected: 1655, in Fuller's Church-History of Britain,^[2] the 1650s in Etymonline.^[3]

Semantic evolution

The adjective follows the senses of the verb.^[2][3] Detect first meant to uncover or expose something hidden (1447–1739), then to inform against a person (to 1645); from 1581 it meant to find out a person's secret act or real character; since 1756 it has also meant to discover the presence or existence of something hard to observe.^[2][3] The last sense is the one usual in detectable today, as in detectable traces of a substance.^[5][1]

Timeline

• 1655 – capable of being detected.^[2][3]

Meanings

Adjective

1. Able to be detected or discovered; noticeable: The test found no detectable trace of lead in the water.^[5][2][1]

Word family

• detectability
• detectably

Related words

• detect
• detection
• detective
• undetectable
• protect

Usage notes

The spelling detectible also occurs.^[1][2]

References

1. ^ a b c d Wiktionary, the free dictionary, https://en.wiktionary.org
2. ^ a b c d e f g h i Oxford English Dictionary Online (accessed March 2026), Oxford: Oxford University Press
3. ^ a b c d e f g Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
4. ^ a b The American Heritage Dictionary of the English Language (online 2024), 5th ed., Boston: Houghton Mifflin Harcourt
5. ^ a b Merriam-Webster Unabridged Dictionary (2024), online ed., Springfield, Mass.: Merriam-Webster