ocular

Etymology

It is borrowed from Middle French oculaire (“visible, evident; a bone of the skull”)^[2][3][4] and directly borrowed from Late Latin oculāris (“of the eyes”),^[2][5][6][7] from Latin oculus (“eye”) and the suffix -āris,^[2][7] from Proto-Indo-European *okw- (“to see”).^[5][6] The OED treats the word as partly French and partly Latin, Hoad and the Shorter Oxford take it from French, and Etymonline, the American Heritage Dictionary, Merriam-Webster and Collins only from Latin;^{[2][3][4][5][6][7][8]} Barnhart thinks that the Latin borrowing was perhaps influenced by the French word.^[9][10] The Latin adjective is recorded from the 4th century, and the sense "perceived by the eye" from 1267 in British sources.^[2] The OED compares Italian oculare, Spanish ocular and German Okular as well.^[2] Klein compares Old English ēage, the ancestor of eye.^[11]

Earliest recorded meaning

The first record is the rare noun for a bone of the skull, in a 1503 translation of the Kalendayr of Shyppars, which renders a French passage of 1493.^[2] The adjective follows in 1570, in ocular witness in an Essex will.^[2] Barnhart's Concise gives about 1503 and the full edition about 1575,^[10][9] and Etymonline has about 1500 for the adjective;^[5] Dictionary.com has 1565–75.^[12]

Semantic evolution

The adjective first had to do with seeing rather than the eye as an organ: an ocular witness (1570) was an eyewitness, and the OED compares tesmoing oculaire of 1580.^[2] From 1589, in Puttenham, it also meant visible or made evident to sight, a use now confined to ocular proof;^[2] Shakespeare's "give me the ocular proof" is the quotation both Johnson and Merriam-Webster chose.^[13][7] Johnson (1755) defined it only as "depending on the eye; known by the eye".^[13] Weekley points to ocular demonstration as the usual phrase.^[14] The bodily sense "of the eye" began in medical translations of 1598 and 1599,^[2] and Donne used it for what a look expresses before 1631.^[2] The noun meaning an eyepiece is recorded by the revised OED from 1702, well before the 1835 that Etymonline and Barnhart give.^[2][5][9] From 1825 to 1881 ocular was a humorous word for the eye itself;^[2][7] zoologists have used it since 1893 for a plate of a sea urchin.^[2]

Timeline

• 1503 – noun, a bone of the skull (obsolete).^[2]
• 1570 – adjective, of a person who has seen a thing happen, or of what is based on sight, in ocular witness.^[2]
• 1589 – visible, evident to sight.^[2]
• 1598 – of or relating to the eye.^[2][7]
• 1599 – applied to the eye, used on the eye.^[2]
• c. 1600 – of an inspection, done by eye.^[2]
• before 1631 – expressed by a look, in Donne.^[2]
• 1640 – resembling an eye.^[2]
• 1648 – noun, something visible or manifest (until 1656).^[2]
• 1702 – noun, the eyepiece of an optical instrument.^[2] Etymonline and Barnhart date it to 1835.^[5][9]
• 1825 – noun, humorously, the eye (until 1881).^[2][7]
• 1831 – of or relating to the sense of sight, in Faraday.^[2]
• 1893 – noun, an ocular plate of a sea urchin.^[2]

Meanings

Adjective

1. Of or relating to the eye: an ocular infection.^[6][8][2]
2. Of or relating to the sense of sight; visual.^[6][7][2]
3. Done by means of sight: an ocular survey of the site.^[7][2]
4. Perceived by the eye; visible, now chiefly in ocular proof.^[6][7][2]
5. Based on what has been seen: an ocular witness.^[7][2]
6. Resembling an eye in form or function.^[6][2]

Noun

1. The eyepiece of a microscope, telescope or other optical instrument.^[6][8][7][2]
2. (zoology) An ocular plate of a sea urchin, or an ocular scale of some reptiles.^[2][7]
3. (obsolete, humorous, 1825–1881) The eye.^[2][7][4]

Word family

• ocularly
• intraocular
• preocular
• subocular
• interocular
• monocular

Related words

• eye
• oculist
• oculus
• inoculate
• inveigle
• ocellus
• monocle
• optic

References

1. ^ a b Wiktionary, the free dictionary, https://en.wiktionary.org
2. ^ a b c d e f g h i j k l m n o p q r s t u v w x y z 27 28 29 30 31 32 33 34 35 36 37 Oxford English Dictionary Online (accessed March 2026), Oxford: Oxford University Press
3. ^ a b Hoad, T. F., ed. (1986), The Concise Oxford Dictionary of English Etymology, Oxford: Clarendon Press
4. ^ a b c Shorter Oxford English Dictionary on Historical Principles (2002), 5th ed., ed. William R. Trumble and Angus Stevenson, Oxford: Oxford University Press
5. ^ a b c d e f Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
6. ^ a b c d e f g h The American Heritage Dictionary of the English Language (online 2024), 5th ed., Boston: Houghton Mifflin Harcourt
7. ^ a b c d e f g h i j k l m n Merriam-Webster Unabridged Dictionary (2024), online ed., Springfield, Mass.: Merriam-Webster
8. ^ a b c Collins English Dictionary (2023), Glasgow: HarperCollins
9. ^ a b c d Barnhart, Robert K. (1988), The Barnhart Dictionary of Etymology
10. ^ a b Barnhart, Robert K., ed. (1995), The Barnhart Concise Dictionary of Etymology, New York: HarperCollins
11. ^ Klein, Ernest. A Comprehensive Etymological Dictionary of the English Language. 2 vols. Amsterdam: Elsevier, 1966–1967.
12. ^ Dictionary.com Unabridged (2016), based on the Random House Unabridged Dictionary, New York: Random House
13. ^ a b Johnson, Samuel (1755), A Dictionary of the English Language, London; 4th ed. 1773; Johnson's Dictionary Online, ed. Beth Rapp Young et al.
14. ^ Weekley, Ernest (1921), An Etymological Dictionary of Modern English, London: John Murray