| architeuthis | (noun) largest mollusk known about but never seen (to 60 feet long) | Synonyms: giant squid |
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| bakshis | (noun) a relatively small amount of money given for services rendered (as by a waiter) | Synonyms: backsheesh, baksheesh, bakshish, gratuity, pourboire, tip |
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| orchis | (noun) one of the two male reproductive glands that produce spermatozoa and secrete androgens | Synonyms: ball, ballock, bollock, egg, nut, testicle, testis |
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| (noun) any of various deciduous terrestrial orchids having fleshy tubers and flowers in erect terminal racemes | - |
| rachis | (noun) the series of vertebrae forming the axis of the skeleton and protecting the spinal cord | Synonyms: back, backbone, spinal column, spine, vertebral column |
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| (noun) axis of a compound leaf or compound inflorescence | - |
| schistorrhachis | (noun) a not uncommon congenital defect in which a vertebra is malformed; unless several vertebrae are affected or there is myelomeningocele there are few symptoms; can be diagnosed by amniocentesis | Synonyms: rachischisis, spina bifida |
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