Since EHV-1 is a common virus in horses, it is recommended that all horses be vaccinated at least once a year. For horses congregating at shows and competitions, more frequent vaccinations may be recommended.
Enfilade and defilade. Enfilade and defilade are concepts in military tactics used to describe a military formation's exposure to enemy fire. A formation or position is in enfilade if weapons fire can be directed along its longest axis.
defÂ·iÂ·niÂ·tion. n. 1. a. A statement of the meaning of a word, phrase, or term, as in a dictionary entry. b. A statement or description of the fundamental character or scope of something: [The panel] calls for a clearer definition of the status of people captured in American military operations (Economist).