| cephalochordate | (noun) fish-like animals having a notochord rather than a true spinal column | - |
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| chord | (noun) a combination of three or more notes that blend harmoniously when sounded together | - |
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| (noun) a straight line connecting two points on a curve | - |
| (verb) bring into consonance, harmony, or accord while making music or singing | Synonyms: harmonise, harmonize |
| (verb) play chords on (a stringed instrument) | - |
| chordal | (adjective) relating to or consisting of or emphasizing chords | - |
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| chordamesoderm | (noun) the area of mesoderm that forms the notochord | Synonyms: chordomesoderm |
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| chordate | (adjective) of or relating to or characteristic of the Chordata | - |
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| (noun) any animal of the phylum Chordata having a notochord or spinal column | - |
| chorditis | (noun) inflammation of the vocal cords | - |
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| (noun) inflammation of the spermatic cord or vocal cords or vocal folds | - |
| chordomesoderm | (noun) the area of mesoderm that forms the notochord | Synonyms: chordamesoderm |
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| chordophone | (noun) a stringed instrument of the group including harps, lutes, lyres, and zithers | - |
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| clavichord | (noun) an early stringed instrument like a piano but with more delicate sound | - |
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| harpsichord | (noun) a clavier with strings that are plucked by plectra mounted on pivots | Synonyms: cembalo |
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| harpsichordist | (noun) someone who plays the harpsichord | - |
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| horde | (noun) a vast multitude | Synonyms: host, legion |
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| (noun) a moving crowd | Synonyms: drove, swarm |
| (noun) a nomadic community | - |
| hordeolum | (noun) an infection of the sebaceous gland of the eyelid | Synonyms: eye infection, sty, stye |
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| notochord | (noun) a flexible rodlike structure that forms the supporting axis of the body in the lowest chordates and lowest vertebrates and in embryos of higher vertebrates | - |
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| urochord | (noun) a notochord of a larval tunicate typically confined to the caudal region | - |
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| (noun) primitive marine animal having a saclike unsegmented body and a urochord that is conspicuous in the larva | Synonyms: tunicate, urochordate |
| urochordate | (noun) primitive marine animal having a saclike unsegmented body and a urochord that is conspicuous in the larva | Synonyms: tunicate, urochord |
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