plural of contact ball

plural of point of contact

plural of contact metamorphism

Contact between a patient and a health professional.

(astronomy) A binary star whose component stars are in physical contact (share an upper atmosphere).

(ornithology) A call made between birds in a flock or a pair in order to maintain contact with one another when foraging, flying, etc.

plural of contact call

(linguistics) The study of language contact

(linguistics) The phenomenon in which speakers of two or more languages or varieties interact and influence each other.

plural of contact binary