also: べにいろきゅうけいけいしょうぶつ
noun
red globular shape; red ball signal shape
Rare technical term, primarily used in marine safety contexts to refer to a red ball-shaped signal.
船舶の安全のために、紅色球形形象物が掲げられた。
A red ball signal shape was displayed for the safety of the vessel.
Compound of 紅色 (red color), 球形 (spherical shape), 形象 (figure/form), and 物 (thing). The exact derivation is uncertain; it appears to be a technical term formed from descriptive elements.