Meaning

noun a metallic tapping sound

noun any of two families of small parasitic arachnids with barbed proboscis; feed on blood of warm-blooded animals

noun a mark indicating that something has been noted or completed etc.

originFrom Middle English tik-, tic-, tike-, tiken- (in compounds), an unassibilated form of Middle English tiche, tichen (“young goat”), from Old English tiċċen (“young goat; kid”), from Proto-West Germanic *tikkīn (“goatling”), diminutive of Proto-West Germanic *tigā (“goat”). Cognate with regional German Zicke (“nanny goat”), from Ziege (“goat; nanny goat”).

Etymology from Wiktionary, CC BY-SA 3.0