Definition: The time period between two cycles of sexual receptivity in female mammals.

Example: The diestrum is an important phase in the reproductive cycle of many animals.

Definition: A phase in female mammals where there is a temporary pause in sexual activity between two heat cycles, allowing the uterus to get ready for a fertilized egg.

Example: After the mating season, the female dog entered diestrus, preparing her body for potential pregnancy.

Definition: Describing animals that walk on their toes, with their heels raised off the ground.

Example: Cats are digitigrade animals, meaning they walk on their toes rather than on their heels.

Definition: A person who digs ditches or trenches, often for drainage or irrigation purposes.

Example: The diker worked all day to create a new drainage system for the farm.

Definition: A type of wild dog found in Australia, usually with a reddish-brown or yellowish-brown coat.

Example: The dingo is known for its unique howl that can be heard across the Australian outback.

Definition: A type of large reptile that lived millions of years ago and is now extinct. They were often very big and could be meat-eaters or plant-eaters.

Example: The museum has a fascinating exhibit about dinosaurs and their habitats.

Definition: Relating to or characteristic of dinosaurs, which are large reptiles that lived millions of years ago.

Example: The dinosaurian fossils found in the area provide insight into the ancient creatures that once roamed the Earth.

Definition: A type of reptile that lived during the Mesozoic era, often characterized by their large size and diverse species.

Example: The museum displayed a dinosaurian skeleton that fascinated all the visitors.

Definition: Relating to or characteristic of dinosaurs, often used to describe something that resembles or is associated with these prehistoric creatures.

Example: The museum had a dinosauric exhibit that showcased the fossils of various species.

Definition: Describing animals that have two sets of teeth during their lifetime, first temporary teeth and then permanent ones.

Example: Humans are diphyodonts because they first have baby teeth that fall out and are replaced by adult teeth.

Definition: A type of arthropod that has a long, segmented body with two pairs of legs on each segment, commonly known as a millipede.

Example: The diplopod crawled slowly across the forest floor, its many legs moving in unison.