an amount of time

the interval taken to complete one cycle of a regularly repeating phenomenon

(ice hockey) one of three divisions into which play is divided in hockey games

a unit of geological time during which a system of rocks formed

the end or completion of something

the monthly discharge of blood from the uterus of nonpregnant women from puberty to menopause

a punctuation mark (.) placed at the end of a declarative sentence to indicate a full stop or after abbreviations

(in games or plays or other performances) the time during which play proceeds

an amount of time

any work of art whose special value lies in its evocation of a historical period

happening or recurring at regular intervals

recurring or reappearing from time to time

any acid of iodine that contains oxygen

irregular breathing of newborns; periods of rapid breathing followed by apnea; believed to be associated with sudden infant death syndrome

abnormal respiration in which periods of shallow and deep breathing alternate

recurrent large circumscribed areas of subcutaneous edema; onset is sudden and it disappears within 24 hours; seen mainly in young women, often as an allergic reaction to food or drugs

an event that recurs at intervals

(chemistry) the principle that chemical properties of the elements are periodic functions of their atomic numbers

motion that recurs over and over and the period of time required for each recurrence remains the same

motion that recurs over and over and the period of time required for each recurrence remains the same

a complex sentence in which the main clause comes last and is preceded by the subordinate clause

(chemistry) a tabular arrangement of the chemical elements according to atomic number as based on the periodic law

a publication that appears at fixed intervals

happening or recurring at regular intervals

North American cicada; appears in great numbers at infrequent intervals because the nymphs take 13 to 17 years to mature

in a sporadic manner

the quality of recurring at regular intervals

of or relating to or involving or practicing periodontics

a disease that attacks the gum and bone and around the teeth

the branch of dentistry dealing with diseases of the gums and other structures around the teeth

of or relating to or involving or practicing periodontics

the branch of dentistry dealing with diseases of the gums and other structures around the teeth

a dentist specializing in diseases of the gums and other structure surrounding the teeth

a disease that attacks the gum and bone and around the teeth