| an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle. |
| a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison. |
| masto- or (before a vowel) mast- | |
| —combining form | |
| indicating the breast, mammary glands, or something resembling a breast or nipple: mastodon; mastoid | |
| [from Greek mastos breast] | |
| mast- or (before a vowel) mast- | |
| —combining form | |
| [from Greek mastos breast] | |
mast- pref.
Variant of masto-.