noun
In chemistry, a functional group or moiety. Often appears in compound terms like 官能基 (functional group).
See also: 官能基
この化合物にはヒドロキシ基が含まれている。
This compound contains a hydroxy group.
noun
In chemistry, an atom or molecule with an unpaired electron. Often used in the compound 遊離基 (free radical).
See also: 遊離基
遊離基は反応性が高い。
Free radicals are highly reactive.
counter
counter for installed or mounted objects
Used for counting things that are set up or placed, such as stone lanterns, gravestones, or satellites. Not a general counter.
庭に石灯籠が三基ある。
There are three stone lanterns in the garden.
この墓地には古い墓石が何基も並んでいる。
Many old gravestones are lined up in this cemetery.