1. (Material Noun-Neuter) a soft, white, powdery limestone consisting chiefly of fossil shells of foraminifers which is often used for marking, as a blackboard crayon ব্লেকব’ৰ্ডত লিখিবলৈ ব্যৱহাৰ কৰা বগা মাটিৰ পদাৰ্থ

English: chalk,
Assamese: খড়ীমাটি, চক-পেঞ্চিল, চক-মাটি,
Khasi: u shok,
Garo: chok,
Nagamese: chok,
Dimasa: haja,
TAI-Ahom: দিন্ ফ্যুক্