本ほん初しょFreq.FrequencyTop 100,000Meanings1noun, adverbbeginning; origin; startFormal or literary term for the very beginning or origin of something. Often used in fixed expressions like 本初子午線 (prime meridian).本ほん初しょ子し午ご線せんは経けい度ど0度どの線せんです。The prime meridian is the line of 0 degrees longitude.この儀ぎ式