Hydra

/hˈa‌ɪdɹɐ/

/ˈhaɪdɹə/

Hydra

small tubular solitary freshwater hydrozoan polyp

trouble that cannot be overcome by a single effort because of its many aspects or its persistent and pervasive quality

a long faint constellation in the southern hemisphere near the equator stretching between Virgo and Cancer

synonyms : Snake

a mythical serpent-like creature in Greek mythology that has multiple heads, and if one head is cut off, two more will grow in its place

Examples

1. Hydras have fascinated biologists for centuries thanks to their spectacular regeneration abilities.

2. Instead of a brain, hydras have nerve nets, the most basic nervous systems in nature.

3. Next one is Hydra.

4. Consider the hydra.