期間

(1)a unit of geological time during which a system of rocks formed; "ganoid fishes swarmed during the earlier geological periods"

(2)岩の体系ができた地質学的時間の単位

(3)a period of indeterminate length (usually short) marked by some action or condition; "he was here for a little while"; "I need to rest for a piece"; "a spell of good weather"; "a patch of bad weather"

(4)何らかの動作や状態によって特徴付けられる確定できない期間（通常短い期間）

(5)continuance in time; "the ceremony was of short duration"; "he complained about the length of time required"

(6)時間内の存続

(7)the complete duration of something; "the job was finished in the span of an hour"

(8)何かの持続時間全体

(9)a definite length of time marked off by two instants

(10)2つの瞬間によって区切られる一定の時間

(11)a limited period of time; "a prison term"; "he left school before the end of term"

(12)所定の期間

(13)an amount of time; "a time period of 30 years"; "hastened the period of time of his recovery"; "Picasso's blue period"

(14)時間の量

(1)