English Dictionary

periodical cicada

名詞

Any of certain species of cicadas, especially in genus Magicicada, which are known for their 17- and 13-year life-cycles, during most of which they develop underground, emerging in large numbers for a short time as large and audible adults, all those emerging in a year constituting a brood.

日本語の意味

周期性セミ：特定のセミ（特にMagicicada属）の一種で、通常13年または17年という長期間の地下成長期を経た後、短期間で大量に成虫として地上に出現し、一斉に成熟・繁殖を行うセミのこと。

After seventeen years underground, a periodical cicada emerged in the orchard and filled the air with its piercing chorus.

地下で17年間過ごした後、17年周期のセミが果樹園に現れ、鋭い鳴き声で空気を満たした。

意味（1）

Any of certain species of cicadas, especially in genus Magicicada, which are known for their 17- and 13-year life-cycles, during most of which they develop underground, emerging in large numbers for a short time as large and audible adults, all those emerging in a year constituting a brood.

An emergence is when a throng of periodical cicadas rises from the ground as soon as the soil reaches about 64 degrees Fahrenheit. The groups of magicicadas, known as broods, surface only once every 13 or 17 years depending on the species.

periodical cicadas （ plural ）