interregnum
noun /ˌɪntəˈreɡnəm/
/ˌɪntəˈreɡnəm/
[usually singular] (plural interregnums)
(formal)- a period of time during which a country, an organization, etc. does not have a leader and is waiting for a new one
（政府改组期间的）政权空白；（机构的）权力空白 词源late 16th cent. (denoting temporary rule between reigns or during suspension of normal government): from Latin, from inter- ‘between’ + regnum ‘reign’.