| deltoid | (noun) a large triangular muscle covering the shoulder joint and serving to abduct and flex and extend and rotate the arm | Synonyms: deltoid muscle, musculus deltoideus |
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| demantoid | (noun) a green andradite used as a gemstone | - |
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| factoid | (noun) a brief (usually one sentence and usually trivial) news item | - |
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| (noun) something resembling a fact; unverified (often invented) information that is given credibility because it appeared in print | - |
| mastoid | (noun) process of the temporal bone behind the ear at the base of the skull | Synonyms: mastoid bone, mastoid process, mastoidal |
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| planetoid | (noun) any of numerous small celestial bodies that move around the sun | Synonyms: minor planet |
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| prismatoid | (noun) a polyhedron whose vertices all lie in one or the other of two parallel planes; the faces that lie in those planes are the bases of the prismatoid | - |
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| sternocleidomastoid | (noun) one of two thick muscles running from the sternum and clavicle to the mastoid and occipital bone; turns head obliquely to the opposite side; when acting together they flex the neck and extend the head | Synonyms: musculus sternocleidomastoideus, sternocleido mastoideus, sternocleidomastoid muscle |
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