An infected tick must be attached for 24 to 48 hours to transmit Lyme disease (and at least 12 to 24 hours to transmit anaplasmosis, another serious tick-borne disease). Lyme disease is unfortunately a fairly common canine disease. Symptoms can include fever, reduced energy, and lameness.
D-day(n.) (Mil.) the day designated for the beginning of a planned attack by a military force; in communications the day is often otherwise unspecified for security reasons; as, the day before D-day the troops will move into position.
D : abbreviation for day. D-day is THE DAY. Historically, D-day was a coded name for the day (June 6th 1944) the Allies troops started an invasion on the Normandy beach. Later on, the term became a war metaphor used for any day that is deemed IMPORTANT. Junior Member89.