The noun A. TESTUDINEUS has 1 sense: 1. a small perch of India whose gills are modified to allow it to breathe air; has spiny pectoral fins that enable it to travel on land. Familiarity information: A. TESTUDINEUS used as a noun is very rare. Dictionary entry details.
If the urine appears thick or has granules in it I'd suspect bladder stones/crystals or infection. The bright yellow color can sometimes indicate a liver or gallbladder problem.
Its yellow when theres a high concentration of solutes. Urine is concentrated when your dehydrated bc you have same amount of solutes with less volume. Its concentrated when you take vitamins bc you have more solutes for the same amount of volume.