Etymology
Advertisement

Words related to -an

amoebaean (adj.)
also amoebean, "alternating, answering alternately," 1650s, from Greek amoibe "change, alteration; exchange" (see amoeba) + -an.
Advertisement
antiquarian (n.)
"one who studies or is fond of antiquities, one versed in knowledge of ancient things," c. 1600, with -an + Latin antiquarius "pertaining to antiquity," from antiquus "ancient, aged, venerable" (see antique (adj.)). In later use more specifically "collector of antiquities; dealer in old books, coins, objects of art, etc." As an adjective, "pertaining to antiquaries," from 1771. Compare antiquary.
Australian (n.)
1690s, originally in reference to aboriginal inhabitants, from Australia + -an. As an adjective by 1814. Australianism in speech is attested from 1891.
authoritarian (adj.)
"favoring imposed order over freedom," 1862, from authority + -an. Compare authoritative, which originally had this meaning to itself. Noun in the sense of one advocating or practicing the principle of authority over individual freedom is from 1859.
avian (adj.)

"resembling or pertaining to birds," 1861, from Latin avis "bird" (from PIE root *awi- "bird") + -an.

Bacchanalian (adj.)
1560s, "characterized by intemperate drinking;" see Bacchanalia + -an. From 1620s as "pertaining to Bacchanals." As a noun from 1610s, "participant in the Bacchanalia."
Cantabrigian (adj.)
"pertaining to Cambridge," 1540s, from Medieval Latin Cantabrigia (see Cambridge) + -an. Shortened form Cantab is attested from 1750 as "member or graduate of the University of Cambridge."
cerulean (adj.)

"sky-colored, sky-blue," 1660s, with -an + Latin caeruleus "blue, dark blue, blue-green," perhaps from a dissimilation of caelulum, diminutive of caelum "heaven, sky," which is of uncertain origin (see celestial). The Latin word was applied by Roman authors to the sky, the Mediterranean, and occasionally to leaves or fields. The older adjective in English was ceruleous (1570s). As a noun, from 1756. The artist's cerulean blue is from 1885.

cetacean (n.)

1836, from Cetacea, name of the order of marine mammals, + -an. As an adjective, "pertaining to the whale," from 1839.

Chaldean 

1580s as a noun; 1732 as an adjective, in reference to Chaldea, the rich plain of southern Babylon, or the people who lived there, with + -an + Latin Chaldaeus, from Greek Khaldaios, from Aramaic (Semitic) Kaldaie, from Akkadian (mat)Kaldu "the Chaldeans."