The universal emergence of atomic hydrogen first occurred during the recombination epoch. At standard temperature and pressure, hydrogen is a colorless, odorless, tasteless, non-toxic, nonmetallic, highly combustible diatomic gas with the molecular formula H 2.
LINK / CITE ADD TO WORD LIST. verb. An eye with a dilated pupil. An eye with a dilated pupil. To dilate is defined as to expand and become wider. An example of dilate is when your eyes become wide with excitement.INK / CITE ADD TO WORD LIST. verb. An eye with a dilated pupil. An eye with a dilated pupil. To dilate is defined as to expand and become wider. An example of dilate is when your eyes become wide with excitement.
diÂ·laÂ·tion. n. 1. a. The act of expanding or enlarging or the state of being expanded or enlarged: dilation of the cervix during labor. b. The condition of being abnormally expanded or enlarged, as of an organ, orifice, or tubular structure in the body. 2.