Preposition: in

• direction: If a minimal surface has space group symmetry, it is periodic in three independent directions.

Modifies a noun

• orbit: In addition the mechanism of control for periodic orbits is now quite well understood [ 2 ] .

• tenancy: Periodic tenancies continue on a monthly basis from the start of the tenancy.

• table: In the center of the periodic table is a block of metallic elements.

• inspection: Sponsors get an annual update of activity in the boxes based on periodic inspections by bat group members during the year.

• comet: The comet the becomes a periodic comet with a definite period for its returns close to the Sun.

• review: A further periodic review took place in November 1999, to set price limits for the period 1 April 2000 to 2005.

Modifying Another Word

• triply: The triply periodic structure is generated by reflections in the faces of the rhombic dodecahedron.

• almost: Davenport was most attracted by Littlewood ' s lectures on the theory of primes and those of Besicovitch on almost periodic functions.

• not: Quasicrystals are surprising because the arrangement of their atoms is regular but not periodic.

• only: Some people need only periodic doses or small daily doses of antibiotics.

• also: Also periodic written and verbal updates should be provided to the person reporting the cluster, the public health office and the community affected.

• therefore: Therefore periodic monitoring of blood, urine and liver function values is recommended if orphenadrine is prescribed for prolonged use.

Used with adjective complement

• have: Lip-reading is very tiring: students may need to have periodic rests.

• become: If the tenancy becomes periodic what are the minimum notice requirements from the tenant?

• require: This sort of analysis would require periodic, regular attitude research with members of the public.

• include: This includes periodic stripping and polishing of hard floors and carpet cleaning.

• need: Inventories will need periodic updating ( see the requirements of the information sub group ).