mast-
1.
variant of
masto-
before a vowel:
mastectomy.
British Dictionary definitions for
mast-
mast-
combining form
1.
a variant of
masto-
masto-
combining form
1.
indicating the breast, mammary glands, or something resembling a breast or nipple:
mastodon,
mastoid
Word Origin
from Greek
mastos
breast
mast-
in Medicine
mast-
pref.
Variant of
masto-
.