Wiktionary
vb. To focus one's aim; to zoom in and center on something.
WordNet
Wikipedia
, also romanized as Zeroin, is a Japanese manga series released in 2004 by Sora Inoue, serialized in Monthly Dragon Age magazine and published in Japan by Kadokowa Comics Dragon Junior. It is published in French by Pika Editions, in German by Egmont Manga & Anime, in South Korea by Haksan Publishing, and in Italy by Flashbook Edizioni.
Usage examples of "zero in".
Oh, I admit it saves manpower, ordinarily, but when you get a cloddy vicious enough to be carrying a shooter, then you should zero in on his wrist teevee phone, assuming he's silly enough to be carrying one, without warning.
Assuming they make straight for the planet with turnover at about one-eight-four million klicks, they'll come to rest relative to Candor at effective range zero in five-point-three-niner hours.
Whichever, there was still a zero in Cam's mobile and whole columns, and Ender looked down from the Scoreboard grinning.
All you have to do to pick an LC at her level is wander around and watch the stroll, zero in on one who fits your requirements.
Every time I tried for any kind of emotional human contact, twenty bastards would zero in on her and I'd be alone again.