deer tick
US /ˈdɪr tɪk/
UK /ˈdɪr tɪk/

1.
a small parasitic arachnid (Ixodes scapularis) that transmits Lyme disease and other infections, commonly found on deer and in wooded areas
:
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After hiking, always check for deer ticks, especially in grassy or wooded areas.
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Lyme disease is primarily transmitted by the bite of an infected deer tick.