[kuh-los-truh
m] 
| a yellowish liquid, esp. rich in immune factors, secreted by the mammary gland of female mammals a few days before and after the birth of their young. |
| co·los·trum (kə-lŏs'trəm) n. The thin yellowish fluid secreted by the mammary glands at the time of parturition that is rich in antibodies and minerals, and precedes the production of true milk. Also called foremilk. [Latin.] co·los'tral (-trəl) adj. |
colostrum co·los·trum (kə-lŏs'trəm)
n.
The first milk secreted at the time of parturition, differing from the milk secreted later by containing more lactalbumin and lactoprotein, and also being rich in antibodies that confer passive immunity to the newborn. Also called foremilk.