noun - very small organisms that you can only see through a microscope

noun, American English - a sword with a curved blade and only one cutting edge

noun - something that has only been made up but is not real

noun - a fast train that stops only at large and important stations

noun - a record or CD that has only one song on it

noun - a person who can only see the bad side of everything

noun - a sword with a curved blade and only one cutting edge

adjective - thinking and talking about oneself too much, only interested in oneself

adjective - having words, pictures, etc. only on one side of a page

noun - a young bird that has only just learned how to fly