Related by context. Frequent words. (Click for all words.) 48 PTFE 45 cavity 43 cylindrical 42 coils 41 tubes 41 crystals 40 membranes 40 coil 40 spacer 40 μm 39 microspheres 39 dielectric 39 resonator 38 membrane 38 spacers 37 impeller 37 substrate 37 honeycomb 37 spherical 36 duct 36 cavities 36 injector 36 conductance 36 perforated 36 perforations 36 nozzle 36 waveguide 35 compartments 35 flange 34 apertures 34 sealant 34 ducts 34 indentations 34 micrometer 33 cannula 33 molar 33 pouch 33 transducer 33 orifices 32 pores 32 capillaries 32 tube 32 combustion chamber 32 hydrogel 32 electrode 32 diameter 31 lobes 31 bladder 31 annulus 31 nanotube 31 gland 31 diaphragm 30 6mm 30 cone 30 electrodes 30 orifice 30 outer layer 30 conductive 29 nostril 29 nodule 29 airflow 28 protrusions 28 lumen 28 septum 28 slits 28 epithelium 28 nasal cavity 28 flue 28 firebox 27 abdominal cavity 27 biofilm 27 soft tissues 26 suction 26 crevices 26 indentation 26 fatty tissue 26 dermis 26 molars 25 sinuses 25 anus 25 outer shell 25 compartment 25 urethra 25 vents 24 nasal passages 24 aperture 24 rectum 24 trachea 23 ear canal 23 esophagus 23 passenger compartment 22 eardrum 22 protrusion 22 chest cavity 21 cancerous tissue 21 crawlspace 20 cranium 19 crevice 19 shaft 18 trench 18 incision