(n) (abbr) helicopter
(P)
(n) helium (He)
(P)
(n) Helios
(adj-f) helical
(n) cadherin
(n) helicoid
(n) helix
(n) heliport
(P)
(n,adj-no) herringbone
(n) heliox
gas mixture of helium and oxygen
often hypoxic gas mix used by divers
medical gas used for its low density and easy breathing
(n) helical gear
(n) helical gear
(n) helicopter
(P)
(n,adj-no) herringbone
(n,adj-no) herringbone
(P)
(n) liquid helium
(n) (comp) inheritance
(n) helioscope
(n) heliostat
(n) heliotrope
(n) heliotropin
(n) heliometer
(n,adj-no) herringbone
(n) (comp) helical scan
(n) observation helicopter
(n) ambulance helicopter
(n) rescue helicopter
(n) attack helicopter
(n) helical spring
(n) light transport helicopter