Ethe, ēth, adj. (Spens.) easy. [A.S. eath.]

Ether, ē′thėr, n. the clear, upper air: the subtile medium supposed to fill all space: a colourless, transparent, volatile liquid of great mobility and high refractive power, and possessing a fragrant odour and a fiery, passing to a cooling, taste.—adj. Ethē′real, consisting of ether: heavenly: airy: spirit-like.—n. Etherealisā′tion.—v.t. Ethē′realise, to convert into ether, or the fluid ether: to render spirit-like.—n. Ethereal′ity.—adv. Ethē′really.—adj. Ethē′reous (Milt.), ethereal.—n. Etherificā′tion.—adj. E′theriform.—n. Etherisā′tion.—v.t. E′therise, to convert into ether: to stupefy with ether.—n. E′therism, the condition induced by using ether. [L.,—Gr. aithēr, aithein, to light up.]

Ethic, eth′ik, adj. relating to morals: treating of morality or duty.—n. (more commonly in pl. Eth′ics) the science of morals, that branch of philosophy which is concerned with human character and conduct: a treatise on morals.—adj. Eth′ical, relating to the science of ethics.—adv. Eth′ically.—n. Eth′icist, one versed in ethics.—Ethical dative, the dative of a first or second personal pronoun implying an indirect interest in the fact stated, used colloquially to give a livelier tone to the sentence. [Gr. ēthikosēthos, custom.]

Ethiopian, ē-thi-ō′pi-an, adj. pertaining to Ethiopia, a name given to the countries south of Egypt inhabited by the negro races.—n. a native of Ethiopia: a blackamoor—(arch.) Ethiop.—adj. Ethiop′ic.—n.pl. Ē′thiops, a term applied by the ancient chemists to certain oxides and sulphides of the metals which possessed a dull, dingy, or black appearance. [Gr. Aithiops, sun-burnt, Ethiopian—aithein, to burn, ōps, the face.]

Ethmoid, -al, eth′moid, -al, adj. resembling a sieve.—Ethmoid bone, one of the eight somewhat cubical bones which collectively form the cranial box. [Gr. ēthmos, a sieve, and eidos, form.]

Ethnic, -al, eth′nik, -al, adj. concerning nations or races: pertaining to the heathen.—ns. Eth′nic, a heathen; Eth′nicism, heathenism; Ethnog′rapher.—adj. Ethnograph′ic.—n. Ethnog′raphy, the scientific description of the races of the earth.—adj. Ethnolog′ical.—adv. Ethnolog′ically.—ns. Ethnol′ogist; Ethnol′ogy, the science that treats of the varieties of the human race. [L.,—Gr. ethnos, a nation; Gr. graphē, writing, logia, discourse.]

Ethology, ē-thol′o-ji, n. a discourse on ethics: the science of character.—adjs. Etholog′ic, -al, relating to ethology: treating of morality.—ns. Ethol′ogist, one versed in ethology or ethics; Ē′thos, habitual character and disposition: the quality of a work of art which produces a high moral impression. [Gr. ēthos, custom, logia, a discourse.]

Ethyl, ē′thil, n. a colourless, inflammable gas, insoluble in water, soluble in alcohol—supposed base of ether. [Gr. aithēr, ether, hylē, base.]

Etiolate, ē-ti-o-lāt′, v.t. (med., bot.) to cause to grow pale from want of light and fresh air.—v.i. to become pale from disease or absence of light.—n. Etiolā′tion. [Fr. étioler, to become pale, to grow into stubble, éteule, stubble—L. stipula, a stalk.]

Etiology, ē-ti-ol′o-ji, n. Same as Ætiology.