. +diastello+, _diastello_, to put asunder.] The
dilatation of the heart and arteries when the blood enters them.

DI-GES'TION. [L. _digestio_.] The process of dissolving food in the
stomach, and preparing it for circulation and nourishment.

DIG-I-TO'RUM. [L. _digitus_, a finger.] A term applied to certain
muscles of the extremities.

DOR'SAL. [L. _dorsum_, the back.] Pertaining to the back.

DU-O-DE'NUM. [L. _duodenus_, of twelve fingers' breadth.] The first
portion of the small intestine.

DU'RA MA'TER. [L. _durus_, hard, and _mater_, mother.] The outermost
membrane of the brain.

DYS'EN-TER-Y. [Gr. +dys+, _dus_, bad, and +enteria+, _enteria_,
intestines.] A discharge of blood and mucus from the intestines
attended with tenesmus.

DYS-PEP'SI-A. [Gr. +dys+, _dus_, bad, and +pepto+, _pepto_, to
digest.] Indigestion, or difficulty of digestion.

EN-AM'EL. [Fr.] The smooth, hard substance which covers the crown or
visible part of a tooth.

EP-I-DERM'IS. [Gr. +epi+, _epi_, upon, and +derma+, _derma_, the
skin.] The scarf-skin; the cuticle.

EP-I-GLOT'TIS. [Gr. +epi+, _epi_, upon, and +glotta+, _glotta_, the
tongue.] One of the cartilages of the glottis.

EU-STA'CHI-AN TUBE. A channel from the fauces to the middle ear, named
from Eustachius, who first described it.

EX'CRE-MENT. [L. _excerno_, to separate.] Matter excreted and ejected;
alvine discharges.

EX-CRE-MEN-TI'TIAL. Pertaining to excrement.

EX'CRE-TO-RY. A little duct or vessel, destined to receive secreted
fluids, and to excrete or discharge them; also, a secretory vessel.

EX-HA'LANT. [L. _exhalo_, to send forth vapor.] Having the quality of
exhaling or evaporating.

EX-TENS'OR. [L.] A name applied to a muscle that serves to extend any
part of the body; opposed to _Flexor_.

FA'CIAL. [L. _facies_, face.] Pertaining to the face.

FALX. [L. _falx_, a scythe.] A process of the dura mater shaped like a
scythe.

FAS'CI-A. [L. _fascia_, a band.] A tendinous expansion or aponeurosis.

FAS-CIC'U-LUS, -LI. [L. _fascis_, a bundle.] A little bundle.

FAUX, -CES. [L.] The top of the throat.

FEM'O-RAL. Pertaining to the femur.

FEM'O-RIS. A term applied to muscles that are attached to the femur.

FE'MUR. [L.] The thigh-bone.

FE-NES'TRA, -UM. [L. _fenestra_, a window.] A term applied to some
openings into the internal ear.

FI'BRE. [L. _fibra_.] An organic filament, or thread, which enters
into the composition of every animal and veget