baby (n.)

late 14c., "infant, young child of either sex," short for baban (early 13c.), which probably is imitative of baby talk (see babble (v.)). In many languages the word means "old woman" (compare Russian babushka "grandmother," from baba "peasant woman"), and it is also sometimes a child's variant of papa "father."

The simplest articulations, and those which are readiest caught by the infant mouth, are the syllables formed by the vowel a with the primary consonants of the labial and dental classes, especially the former ; ma, ba, pa, na, da, ta. Out of these, therefore, is very generally formed the limited vocabulary required at the earliest period of infant life comprising the names for father, mother, infant, breast, food. [Hensleigh Wedgwood, "A Dictionary of English Etymology," 1859]

Crist crid in cradil, "moder, baba!" [John Audelay, c. 1426]

Now mostly superseded by its diminutive form baby. Used figuratively for "a childish person" from 1520s. The meaning "attractive young woman" is by 1915 in college slang (baby as "girl, young woman, girlfriend" is attested by 1839; see babe). A babe in arms is one so young it has to be carried; babe in the woods "an innocent among perils" is from 1795.

"center of the eye, orifice of the iris," early 15c. pupille (the word is in English in Latin form from late 14c.), from Old French pupille (14c.) and directly from Latin pupilla, originally "little girl-doll," diminutive of pupa "girl; doll" (see pupil (n.1)).

The eye region was so called from the tiny image one sees of oneself reflected in the eye of another. Greek used a single word, korē (literally "girl;" see Kore), to mean both "doll" and "pupil of the eye;" and compare obsolete English baby "small image of oneself in another's pupil" (1590s), source of 17c. colloquial expression to look babies "stare lovingly into another's eyes."

Self-knowledge can be obtained only by looking into the mind and virtue of the soul, which is the diviner part of a man, as we see our own image in another's eye. [Plato, Alcibiades, I.133]