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aster a plant with white, pink, blue, or purple flowers. The flowers are made up of many narrow petals around a yellow center.
asterisk a sign (*). It is used to show that there is other information on the page that explains the information where the sign is placed.
asteroid a small, rocky, planet-like body that circles the sun, mostly found between the orbits of Jupiter and Mars. The size of an asteroid can range from less than one mile to five hundred miles across.
asthma a disease of the lungs that makes it difficult to breathe. Asthma is often caused by an allergy.
as though as if.
astir in action; moving.
astonish to fill with great surprise or amazement.
astonishment great surprise or amazement.
astound to cause surprise or wonder; amaze.
astray off the right or known path or course.
astride over or upon and with a leg on each side of. [2 definitions]
astrology the study of the influence that the stars and planets may have on people's lives.
astronaut a person trained to take part in space flight.
astronomer a scientist who studies the universe beyond the earth.
astronomical having to do with astronomy. [2 definitions]
astronomy the branch of science that studies the universe beyond the earth.
as well besides; also; too.
as well as and also.
as yet up until now.
asylum a place that offers safety. [3 definitions]
at1 on or in the location of. [5 definitions]