Greater zygomatic muscle

What is Greater zygomatic muscle?

Greater zygomatic muscle definition and meaning on Dictionary terms:
adjective,, greatA.est.
unusually or comparatively large in size or dimensions: A great fire destroyed nearly half the city.
large in number; numerous: Great hordes of tourists descend on Europe each summer.
unusual or considerable in degree, power, intensity, etc.: great pain.

wonderful; first-rate; very good: We had a great time. That’s great!
being such in an extreme or notable degree: great friends; a great talker.
notable; remarkable; exceptionally outstanding: a great occasion.
important; highly significant or consequential: the great issues in American history.
distinguished; famous: a great inventor.
of noble or lofty character: great thoughts.
chief or principal: the great hall; his greatest novel.
of high rank, official position, or social standing: a great noble.
much in use or favor: a??Humora?? was a great word with the old physiologists.
of extraordinary powers; having unusual merit; very admirable: a great statesman.
of considerable duration or length: We waited a great while for the train.
Informal. enthusiastic about some specified activity (usually followed by at, for, or on): He’s great on reading poetry aloud. skillful; expert (usually followed by at or on): He’s great at golf.

being of one generation more remote from the family relative specified (used in combination): a great-grandson.

Informal. very well: Things have been going great for him.

noun, plural greats, (especially collectively) great.
a person who has achieved importance or distinction in a field: She is one of the theater’s greats.
great persons, collectively: England’s literary great.

(often initial capital letter) greats, (used with a singular verb) Also called great go. British Informal. the final examination for the bachelor’s degree in the classics and mathematics, or Literae Humaniores, especially at Oxford University and usually for honors. the course of study. the subject studied.

(used to express acceptance, appreciation, approval, admiration, etc.).
(used ironically or facetiously to express disappointment, annoyance, distress, etc.): Great! We just missed the last train home.