EO -abbr

  1. executive order

eo- -comb form

  1. earliest : oldest
    • eo lithic

Eo·cene ['ē-ə-,sēn] -adj, n

  1. of, relating to, or being an epoch of the Tertiary between the Paleocene and the Oligocene or the corresponding series of rocks

EOE -abbr

  1. equal opportunity employer

eo·hip·pus [,ē-ō-'hi-pəs] -n

  1. any of a genus ( Hyracotheriumsyn. Eohippus) of very small primitive horses from the Lower Eocene having 4-toed forefeet and 3-toed hind feet called also dawn horse

eo·lian [ē-'ō-lē-ən, -'ōl-yən] -adj

  1. borne, deposited, produced, or eroded by the wind

eo·lith ['ē-ə-,lith] -n

  1. a very crudely chipped flint

Eo·lith·ic [,ē-ə-'li-thik] -adj

  1. of or relating to the early period of the Stone Age marked by the use of eoliths

EOM -abbr

  1. end of month

eon ['ē-ən, 'ē-,än] -n

(variant of aeon)

  1. an immeasurably or indefinitely long period of time : age
  2. a very large division of geologic time usu. longer than an era
  3. a unit of geologic time equal to one billion years

eo no·mi·ne [,ē-ō-'nä-mə-nē]

  1. by or under that name

Eos ['ē-,äs] -n

  1. the Greek goddess of dawn

eo·sin ['ē-ə-sən] -n

  1. a red fluorescent dye C 20H 8Br 4O 5obtained by the action of bromine on fluorescein and used esp. in cosmetics and as a toner
  2. its red to brown sodium or potassium salt used esp. as a biological stain for cytoplasmic structures
  3. any of several dyes related to eosin

eo·sin·o·phil [,ē-ə-'si-nə-,fil] -adj

  1. eosinophilic

eosinophil -n

  1. a granulocyte readily stained by eosin that is present at sites of allergic reactions and parasitic infections

eo·sin·o·phil·ia [-,si-nə-'fi-lē-ə] -n

  1. abnormal increase in the number of eosinophils in the blood that is characteristic of allergic states and various parasitic infections

eo·sin·o·phil·ic [-,si-nə-'fi-lik] -adj

  1. staining readily with eosin
  2. of, relating to, or characterized by eosinophilia