pycnodysostosis or pyknodysostosis /-dis-os-tōˈsis/ noun (Gr dys abnormal, osteon bone, and -osis diseased state; medicine)

A rare inherited bone disease characterized by short stature and fragility and thickening of the bones

pycnogˈonid noun

A member of the Pycnogonˈida (Gr gony knee) the sea spiders, a class of marine arthropods with more leg than body

pycnogˈonoid adjective

pycnomˈeter or pyknomˈeter noun

An instrument for determining specific gravities

pycˈnon noun

1. In ancient Greek music, that part of the tetrachord (chromatic or enharmonic) where the smallest intervals fall
2. In medieval music, a semitone

pycnōsˈis noun (biology)

The shrinkage of the stainable material of a nucleus into a deeply staining knot, usu a feature of cell degeneration

pycˈnospore noun (botany)

A pycnidiospore

pycˈnostyle adjective (Gr stȳlos column; architecture)

(of ancient Greek temples and buildings of a similar style) with close-set columns, 11/2 diameters apart

A pycnostyle building