Either: resembling an echo, or using words that imitate the sound they denote.
According to dictionary.com and audioenglish.net.
(Just saying)
Absolutely not.It is an American slang word with echoic origin.
The term I think you are looking for is "well circumscribed hypo-echoic nodule." The phrase well circumscribed means that the item looked at has well defined edges. When talking about nodules or tumors in the body, it is generally a good thing. The phrase hypo-echoic means that it did not reflect a lot of waves back to the sensor.
They are sestinas.
Some choices: echoed, voiced, choice, device, advice, acidic, accede, heaved, echoic, cached, coccid, codeia
heteroechoic nodule in left lobe
a momentary sensory memory of auditory stimuli
Some examples of echoic words include "buzz," "meow," "sizzle," "pop," and "boom." These words imitate sounds that they describe, making them onomatopoeic in nature.
duration of iconic memory for about less than one second whereas duration of Echoic memory for about Three to four second- Nilesh Gunjal ( M.A. Psychology)
echoic memory.
Since I have to assume you are seeing an ultrasound...the answer is no...it is not a nonviable pregnancy...in early pregnancy the conceptus in a horse is a circular ball that looks black in the center because it is fluid filled...as the conceptus changes into an embryo and subsequently a fetus it be comes white because the tissue is hyper-echoic (white) as opposed to hypo-echoic (black) fluid.
chicer, choice, choric, cicero, coheir, cowier, cowrie, echoic, heroic, ochery
Multiple hetero-echoic lesions within the uterine wall typically refer to areas that display varying echogenicity on an ultrasound, indicating the presence of different types of tissue or abnormalities. These lesions can be associated with conditions such as uterine fibroids, adenomyosis, or endometrial polyps. The hetero-echoic nature suggests that the lesions may have differing compositions, which can affect their diagnosis and management. Further evaluation, including a detailed ultrasound or MRI, may be necessary to determine the exact nature and implications of these lesions.