| April |
the fourth month of the year. April has thirty days. |
| August |
the eighth month of the year. August has thirty-one days. |
| December |
the twelfth month of the year. December has thirty-one days. Winter begins in December for people who live north of the equator. |
| fortieth |
coming next after the thirty-ninth in a series. [2/3 definitions] |
| gale |
a strong wind of about thirty to sixty miles per hour. [1/2 definitions] |
| January |
the first month of the year. January has thirty-one days. |
| July |
the seventh month of the year. July has thirty-one days. |
| June |
the sixth month of the year. June has thirty days. Summer begins in June for people who live north of the equator. |
| March |
the third month of the year. March has thirty-one days. Spring begins in March for people who live north of the equator. |
| May |
the fifth month of the year. May has thirty-one days. |
| November |
the eleventh month of the year. November has thirty days. |
| October |
the tenth month of the year. October has thirty-one days. |
| point |
one of the thirty-two directions as marked on a compass. [1/13 definitions] |
| September |
the ninth month of the year. September has thirty days. Autumn begins in September for people who live north of the equator. |
| stratosphere |
a layer of the earth's upper atmosphere from about six miles to about thirty miles above the earth's surface. |
| thirtieth |
one of thirty equal parts of a whole; 1/30. [1/3 definitions] |
| thirty |
being thirty in number. [1/2 definitions] |
| zither |
a stringed instrument that has a flat sound box and thirty or forty strings. Zithers are played by plucking the strings. |