Definitions

1. noun

a family of large, nocturnal, flightless birds, including ostriches, emus, and kiwis, characterized by powerful legs and strong, clawed feet.

“The team of zoologists conducted a study on the unique characteristics of the Apterygidae family, including their ability to run at high speeds.”

2. plural noun

a group of large, nocturnal, flightless birds, including ostriches, emus, and kiwis.

“The Apterygidae are found primarily in Australia, New Zealand, and parts of Asia.”