Acridines can be signed by forming the letter "A" with your dominant hand and circling it over your non-dominant hand, which is held flat and facing up.
Acridine can be signed by using one hand to make a "C" shape and rotating it in front of the nose, representing the chemical structure of the molecule.
To sign the word "acrididae," use a combination of handshapes and movements to represent the letters A-C-R-I-D-I-D-A-E in American Sign Language (ASL).
To sign the word "acridid," make the letter "a" with your dominant hand, then use your non-dominant hand to draw a horizontal line across the palm of your dominant hand.