ecesis

(ecology) the process by which a plant or animal becomes established in a new habitat ;

ecf

liquid containing proteins and electrolytes including the liquid in blood plasma and interstitial fluid; "the body normally has about 15 quarts of extracellular fluid" ;

ecg

a graphical recording of the cardiac cycle produced by an electrocardiograph ;

echelon

a diffraction grating consisting of a pile of plates of equal thickness arranged stepwise with a constant offset ; a body of troops arranged in a line ;

echeneididae

fishes having a sucking disk on the head for clinging to other fishes and to ships ;

echeneis

type genus of the Echeneididae: typical remoras ;

echeneis naucrates

remoras found attached to sharks ;

echidna

a burrowing monotreme mammal covered with spines and having a long snout and claws for hunting ants and termites; native to Australia ; a burrowing monotreme mammal covered with spines and having a long snout and and claws for hunting ants and termites; native to New Guinea ;

echidnophaga

a genus of Siphonaptera ;

echidnophaga gallinacea

parasitic on especially the heads of chickens ;

echinacea

small genus of North American coarse perennial herbs ;

echinocactus

any cactus of the genus Echinocactus; strongly ribbed and very spiny; southwestern United States to Brazil ;

echinocactus grusonii

large cactus of east central Mexico having golden to pale yellow flowers and spines ;

echinocereus

large genus of low-growing shrubby ribbed cacti of Mexico and southwestern United States ;

echinochloa

annual or perennial succulent grasses of warm regions ;

echinochloa crusgalli

a coarse annual panic grass; a cosmopolitan weed; occasionally used for hay or grazing ;

echinochloa frumentacea

coarse annual grass cultivated in Japan and southeastern Asia for its edible seeds and for forage; important wildlife food in United States ;

echinococcosis

infestation with larval echinococci (tapeworms) ;

echinococcus

tapeworms whose larvae are parasitic in humans and domestic animals ;

echinoderm

marine invertebrates with tube feet and five-part radially symmetrical bodies ;

echinoderm family

a family of echinoderms ;

echinoderm genus

a genus of echinoderms ;

echinodermata

radially symmetrical marine invertebrates including e.g. starfish and sea urchins and sea cucumbers ;

echinoidea

sea urchins and sand dollars ;

echinops

genus of Mediterranean and Eurasian herbs: globe thistles ;

echinus

ovolo molding between the shaft and the abacus of a Doric column ;

echinus esculentus

a sea urchin that can be eaten ;

echium

a genus of bristly herbs and shrubs of the family Boraginaceae ;

echium vulgare

a coarse prickly European weed with spikes of blue flowers; naturalized in United States ;

echo

the persistence of a sound after its source has stopped ; a reply that repeats what has just been said ; (Greek mythology) a nymph who was spurned by Narcissus and pined away until only her voice remained ;

echo sounder

a measuring instrument that sends out an acoustic pulse in water and measures distances in terms of the time for the echo of the pulse to return; "sonar is an acronym for sound navigation ranging"; "asdic is an acronym for antisubmarine detection investigation committee" ;

echo sounding

determining the location of something by measuring the time it takes for an echo to return from it ;

echocardiogram

a graphical image of the heart produced by an echocardiograph ;

echocardiograph

a sonograph that creates an image of the heart and its abnormalities ;

echocardiography

a noninvasive diagnostic procedure that uses ultrasound to study to structure and motions of the heart ;

echoencephalogram

a graphical image of the brain produced by an echoencephalograph ;

echoencephalograph

a sonograph that creates an image of the brain and its abnormalities ;

echoencephalography

a noninvasive diagnostic procedure that uses ultrasound to study the anatomy of the brain ;

echogram

an image of a structure that is produced by ultrasonography (reflections of high-frequency sound waves); used to observe fetal growth or to study bodily organs ;

echography

using the reflections of high-frequency sound waves to construct an image of a body organ (a sonogram); commonly used to observe fetal growth or study bodily organs ;