1A system — an organized whole made up of interrelated parts, such as an organizational or mechanical structure.
この工場の電気系統は複雑に張り巡らされている。
This factory's electrical system is intricately laid out.
会社の指揮系統がはっきりしないと、現場が混乱する。
If a company's chain of command isn't clear, the workplace falls into confusion.
新しい交通系統が導入され、通勤が便利になった。
A new transportation system was introduced, making commuting more convenient.
データを系統立てて整理すると、後で探しやすい。
If you organize data systematically, it's easier to find later.
2A lineage or family line — the sequence of descent connecting ancestors to their descendants.
彼女は代々続く医者の家系の系統に生まれた。
She was born into a family lineage of doctors that has continued for generations.
その品種は純粋な血統の系統を保っている。
That breed maintains a pure bloodline.
家系図を作って先祖の系統をたどってみた。
I made a family tree to trace my ancestors' lineage.
3A classification grouping things (colors, languages, schools of thought, etc.) that share common traits — often used in the form "〜系統."
カーテンは部屋の雰囲気に合わせて暖色系統を選んだ。
I chose curtains in warm color tones to match the room's atmosphere.
インド・ヨーロッパ語系統には多くの言語が含まれる。
The Indo-European language family includes many languages.
彼はリベラル系統の政治家として知られている。
He is known as a politician of the liberal camp.
4In biology, the evolutionary line of descent connecting organisms — indicating a close relationship through a shared common ancestor.
DNA解析によって二種の系統関係が明らかになった。
DNA analysis revealed the phylogenetic relationship between the two species.
5In genetics or epidemiology, a population descended from a common ancestor, or a strain of a virus or bacterium.
変異した新しい系統のウイルスが確認された。
A new mutated viral strain was confirmed.