an automatic device causing a light to flash on and off rapidly
compress or squeeze forcefully so as to break, damage, or distort in shape; noun form of crush
the fact or process of a species, family, or other group of animals or plants becoming extinct
move or cause to move back and forth or from side to side while suspended or on an axis; plural
an animal that feeds on plants
close to the actual, but not completely accurate or exact
keeping or showing a balance; arranged in good proportions
a horse-drawn carriage, especially a closed one
the branch of mathematics dealing with the properties and manipulation of numbers
a period of time equal to sixty seconds or a sixtieth of an hour; plural
move along a smooth surface while maintaining continuous contact with it
(in football, soccer, rugby, hockey, and some other games) a pair of posts linked by a crossbar and often with a net attached behind it, forming a space into or over which the ball has to be sent in order to score
the dependence of two or more people or things on each other
the location of objects by reflected sound, in particular that used by animals such as dolphins and bats
(of a species) seriously at risk of extinction
a small hole in a tire resulting in an escape of air
written works, especially those considered of superior or lasting artistic merit
no quantity or number; naught; the figure 0
a supposition or proposed explanation made on the basis of limited evidence as a starting point for further investigation
either of two equal or corresponding parts into which something is or can be divided
an educational talk to an audience, especially to students in a university or college
the number equivalent to the product of four and ten; ten less than fifty; 40