Sentence:  I said slowly: “I  must be making a megalight, or more, an hour. At this rate the journey will take  about two weeks—” “Yes,” Lipsey said. “We think the Xeelee have a range of  hyperdrive capabilities. The standard intragalactic version is limited to a <WSD>kilolight</WSD>  an hour, ... 
Meaning of the word marked with <WSD> tags:  a unit of distance equal to one thousand light-years; a kilolight-year