Under the microscope, the biologist noticed a single spinule on the surface of the diatom.

Under the microscope, the beetle's wing membrane was covered with tiny spinules that scattered light.

The spinulous seed pod snagged my glove every time I tried to pick it up.

The marine biologist studied the spinulation on the crustacean's exoskeleton under high magnification.

The spinulate seed coat made germination difficult but effectively protected the embryo.

The botanist described the cactus as spinulated after examining its dense covering of tiny spines.

The researchers documented several unexpected spinulations during the microscopic analysis.

The spinulescent leaves of the cactus made it difficult to handle without thick gloves.