home / medterms medical dictionary a-z list / ethmoid sinus definition Medical Definition of Ethmoid sinus Ethmoid sinus: A collection of air cells within the ethmoid bone, a spongy bone which makes up the front of the floor of the skull and the roof of the nose. From the Greek ethmos, sieve + eidos, resemblance = like a sieve.
Confidence votes 84.8K. It takes 4.05 hours to 4.12 hours for light from the sun to reach Neptune, depending where it is in it's orbit. It takes 4.05 hours to 4.12 hours for light from the sun to reach Neptune, depending where it is in it's orbit.
Neptune takes 60,190 earth days or 164.79 earth years to complete one rotation around the sun. 19 hours 165 Earth years The orbital period for Neptune is roughly 60,190 days o â¦ r about 165 Earth years (164.79 Earth years).That makes a year on Neptune the equivalant of 165 years on Earth.A year is the time it takes any planet or object to make one complete solar orbit. + 4 others found this useful.9 hours 165 Earth years The orbital period for Neptune is roughly 60,190 days o â¦ r about 165 Earth years (164.79 Earth years). That makes a year on Neptune the equivalant of 165 years on Earth. A year is the time it takes any planet or object to make one complete solar orbit. + 4 others found this useful.