cartilaginous fishes having horizontally flattened bodies and enlarged winglike pectoral fins with gills on the underside; most swim by moving the pectoral fins
any of the stiff bony rods in the fin of a fish
a branch of an umbel or an umbelliform inflorescence
(mathematics) a straight line extending from a point
emit as rays; "That tower rays a laser beam for miles across the sky"
the activity of putting something in written form; "she did the thinking while he did the writing"
the act of creating written works; "writing was a form of therapy for him"; "it was a matter of disputed authorship"
letters or symbols written or imprinted on a surface to represent the sounds or words of a language; "he turned the paper over so the writing wouldn't show"; "the doctor's writing was illegible"
the work of a writer; anything expressed in letters of the alphabet (especially when considered from the point of view of style and effect); "the writing in her novels is excellent"; "that editorial was a fine piece of writing"
(usually plural) the collected work of an author; "the idea occurs with increasing frequency in Hemingway's writings"
the number of observations in a given statistical category
the ratio of the number of observations in a statistical category to the total number of observations
the number of occurrences within a given time period; "the frequency of modulation was 40 cycles per second"; "the frequency of his seizures increased as he grew older"
a wave resulting from the periodic flow of the tides that is caused by the gravitational attraction of the moon and sun
an unusual (and often destructive) rise of water along the seashore caused by a storm or a combination of wind and high tide
an overwhelming manifestation of some emotion or phenomenon; "a tidal wave of nausea"; "the flood of letters hit him with the force of a tidal wave"; "a tidal wave of crime"