The building blocks of English

Affixes

-ides

Also ‑oides.

Plant and animal genera.

Greek plural ending ‑eidēs, related to eidos, form.

Terms often contain the linking vowel ‑o‑, present in many Greek source words. Examples are Anthropoides, the genus of the demoiselle cranes; Lampides, the genus containing the long-tailed blue butterfly; Bacteroides, a genus of bacteria, normally living in the body, which can cause severe infection.