Chilopoda Arthropod
Puzzle 18 of Sherlock Holmes Hard Pack
Question is: Chilopoda Arthropod
and the answer is: CENTIPEDE
Word Meaning:
CENTIPEDE — Any arthropod of class Chilopoda, which have a segmented body with one pair of legs per segment and from about 20 to 300 legs in total.
Definitions from Wiktionary.