ot-

From ὠτ- (ōt-), the stem of the Ancient Greek οὖς (oûs, “ear”).

• (UK) enPR: ōt, IPA^(key): /əʊt/
• Homophone: oat
• (US) enPR: ōt, IPA^(key): /oʊt/

ot-

1. ear

• When combined with a word or another affix which begins with a consonant, this prefix concatenates with -o- (as oto-).

• (ear): aur- (Latinate equivalent)

• otoconial
• otoconium
• otocony

• auriculo-

• “Oto-” listed on page 233 of volume VII (O, P) of A New English Dictionary on Historical Principles [1st ed., 1909]
    Oto-, before a vowel ot-, a. Gr. ὠτο-, combining form of οὖς, ὠτ- ear, an element of medical and other scientific words, the more important of which appear in their alphabetical places. [¶; 28 derived terms, viz. otocatarrh, otoconia, otokonies, otoconial, otoconite, otocrane, otocranial, otocranic, otocyst, otocystic, otodynia, otodynic, otography, otographical, otomorphology, otomycosis, otopathy, otopathic, otophone, otoplasty, otoplastic, otopyosis, otorrhœa, otorrhœal, otorrhoic, otosalpinx, otosteal, ototomy; ¶; 20 quots.: 1855, 1881, 1842, 1854, 1872, 1857, 1877, 1878, 1880, 1836–9, 1900, 1877, 1839, 1888, 1818–20, 1878, 1877, 1857, 1854, 1868]
• “oto-” listed in the Oxford English Dictionary [2nd ed., 1989]
• “oto-, comb. form” listed in the Oxford English Dictionary [3rd ed., September 2004]

• T.O., TO, to, to-

ot-

1. prefix attached to words relating to the head or heart

ot-

1. combining form of ogi (“bread”)

Used when the following element of the compound starts with a vowel, s or z. Otherwise, the combining form o- is used.