hippus

[hip-uhs]

noun Medicine/Medical.

spasmodic contraction of the pupil of the eye.

Origin:
1675–85; < Neo-Latin < Greek híppos horse, complaint of the eye

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Hippus is always a great word to know.

So is pollex. Does it mean:

a combining form meaning "ear":

the innermost digit of the forelimb; thumb.

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Dictionary.com Unabridged

variant of hippo- as final element of compounds: eohippus.

Origin:
< Latin < Greek -hippos

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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American Heritage

Medical Dictionary

hippus hip·pus (hĭp'əs)
n.
Spasmodic, rhythmical dilation and constriction of the pupil, independent of illumination, convergence, or psychic stimuli.

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hippus

hip·pus

-hippus