1. birdlike - Adjective
2. birdlike - Adverb
Resembling a bird.
Source: Webster's dictionary... if you saw a baby tyrannosaur you would probably think it was a weird looking bird. A full grown one might have had feathers too, maybe not on its whole body though, maybe more of an ornamental display sort of feathers. So traits in the theropod dinosaurs were more birdlike than say, crocodiles. Mark Norell
Barsbold (1983) and Zweers and Van den Berge (1997) noted that many maniraptoran lineages are extremely birdlike, and they suggested that different groups of birds may have descended from different dinosaur ancestors. Source: Internet
Rutherford presented the character as a bold and eccentric old lady, different from the prim and birdlike character Christie created in her novels. Source: Internet
It is also common for adjectives to be derived from nouns, as in boyish, birdlike, behavioral (behavioural), famous, manly, angelic, and so on. Source: Internet