crescograph

English

Etymology

Latin crēscō (“to grow”) +‎ -graph

Noun

crescograph (plural crescographs)

1. A device for measuring growth in plants.
   • 1920 February, Scientific American Monthly‎^[1], page 120:

     For the detection of variation of growth it was necessary to devise the extremely sensitive balanced crescograph.

   • 1920, Edward Jewitt Wheeler, “Are plant life and animal life essentially the same?”, in Current Opinion‎^[2], volume 69, page 828:

     The magnetic crescograph, invented by the famed Indian botanist, Sir Jagadish Chandra Bose, for this purpose, seems capable of magnifying the highest powers of the microscope a hundred thousand times.

   • 1936, J.C. Squire, The London Mercury, volume 33, page 511:

     His various "crescographs," or growth recorders, have steadily increased in sensitiveness, until in the latest, the magnetic crescograph, we have an instrument which magnifies the movement ten million times.