naiad
noun
[ ˈnʌɪad ]
• (in classical mythology) a water nymph said to inhabit a river, spring, or waterfall.
• the aquatic larva or nymph of a dragonfly, mayfly, or stonefly.
• a submerged aquatic plant with narrow leaves and minute flowers.
Origin:
via Latin from Greek Naias, Naiad-, from naein ‘to flow’. Use as a term in entomology and botany dates from the early 20th century.
