Alos Hashachar - Dawn.
Brochos - Blessings.
Chatzos Halayla - Midnight (halfway between sunset and sunrise).
Chatzos Hayom - Midday (halfway between sunrise and sunset).
Daven, Davening - Pray, Praying.
Halacha, Halachic - Jewish Law.
Halachic Hour - 1/12 of the day.
Hallel - Special prayer of thanks recited on holidays.
Havdalah - Prayer recited following the Sabbath.
Kehilla - Jewish community.
Kiddush - Blessing recited on Sabbath with a cup of wine.
Kosher, Kashrus - Jewish dietary laws.
Maariv - Evening prayers.
Melacha - Work prohibited on the Sabbath.
Milah - Circumcision.
Mincha Gedola - Earliest time for afternoon prayers.
Mincha - Afternoon prayers.
Mitzvah, Mitzvos - Commandments Jews fulfill.
Plag Hamincha - 1¼ halachic hours prior to sunset.
Rav - Rabbi
Shabbos, Sabbath - Jewish day of rest. Begins before sunset on Friday and ends when stars come out on Saturday night.
Shacharis - Morning prayers.
Shema - Prayer recited in the morning and evening.
Sof Zman Krias Shema - Latest time for morning shema.
Sof Zman Tefilla - Latest time for morning prayers.
Tallis - Prayer shawl worn during morning prayers.
Tefilla - Prayer.
Tefillin - Phylacteries worn during morning prayers.
Tzais Hakochavim - When stars come out.
V'tzarich Iyun - This complicated issue requires further research and discussion beyond the scope of this article.