| STYGIAN | • stygian adj. Alternative form of Stygian (“of or relating to the river Styx”). • stygian adj. (Literary) Dark and gloomy.
 • stygian adj. (Literary) Infernal or hellish.
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| PTERYGIA | • pterygia n. Plural of pterygium. • PTERYGIUM n. a growth over the cornea.
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| SYZYGIAL | • syzygial adj. Of or pertaining to a syzygy. • SYZYGIAL adj. related to a syzygy, also SYZYGAL, SYZYGETIC.
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| UROPYGIA | • uropygia n. Plural of uropygium. • UROPYGIUM n. the rump of a bird which supports the tail feathers.
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| COCCYGIAN | • coccygian adj. (Anatomy) Relating to the coccyx. • COCCYGIAN adj. relating to the coccyx, the tailbone, also COCCYGEAL.
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| PTERYGIAL | • pterygial adj. (Anatomy) Of or pertaining to the pterygium. • PTERYGIAL adj. of or relating to a wing or fin.
 • PTERYGIAL n. a bone in a fin.
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| UROPYGIAL | • uropygial adj. (Ornithology) Of or pertaining to the uropygium; on the rump. • UROPYGIAL adj. of or pertaining to the uropygium, or prominence at the base of the tail feathers, in birds.
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| APTERYGIAL | • apterygial adj. (Zoology) That lacks limbs, fins or wings. • APTERYGIAL adj. wingless; finless.
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| PTERYGIALS | • PTERYGIAL n. a bone in a fin. | 
| CALLIPYGIAN | • callipygian adj. Having beautifully shaped buttocks. • CALLIPYGIAN adj. having beautiful buttocks, also CALLIPYGEAN, CALLIPYGOUS.
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| STEATOPYGIA | • steatopygia n. An excessive accumulation of fat on the buttocks. • STEATOPYGIA n. an excessive development of fat on the buttocks, esp. of females, also STEATOPYGA.
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| HYPOPHRYGIAN | • hypophrygian adj. (Music) Of or relating to a musical mode or diatonic scale in medieval chant theory, the fourth mode… • hypophrygian n. (Music) The hypophrygian mode.
 • Hypophrygian adj. Alternative form of hypophrygian.
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| STEATOPYGIAS | • steatopygias n. Plural of steatopygia. • STEATOPYGIA n. an excessive development of fat on the buttocks, esp. of females, also STEATOPYGA.
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| HYPERPHRYGIAN | • HYPERPHRYGIAN adj. above the Phrygian; applied to a mode of ancient Greek music having as its lower tetrachord the upper tetrachord of the Phrygian. | 
| SAUROPTERYGIAN | • sauropterygian n. A reptile of the extinct superorder Sauropterygia. • SAUROPTERYGIAN n. any carnivorous Mesozoic marine reptile of the group Sauropterygia, with paddle-like limbs.
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| CROSSOPTERYGIAN | • crossopterygian adj. (Zoology) Of or pertaining to the Crossopterygii, an infraclass of bony fish. • crossopterygian n. (Zoology) One of the Crossopterygii.
 • CROSSOPTERYGIAN n. a member of a subclass of mostly extinct bony fishes, including the coelacanth.
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| MALACOPTERYGIAN | • malacopterygian n. (Archaic) (zoology) Any of the obsolete order of fish Malacopterygii. • MALACOPTERYGIAN adj. belonging to the Malacopterygii, a soft-finned suborder of bony fishes, including herrings and salmon.
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| SAUROPTERYGIANS | • sauropterygians n. Plural of sauropterygian. • SAUROPTERYGIAN n. any carnivorous Mesozoic marine reptile of the group Sauropterygia, with paddle-like limbs.
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