cog-wheel

n wheel with teeth round the edge 嵌齿轮. =>illus 见插图.

coefficient, coerce, coercion, coercive, coeval, coexist, coexistence, coffee, coffee bar, coffee bean, coffee grinder (also `coffee-mill), coffee shop, coffee tree, coffee-house, coffee-pot, coffee-table, coffer, coffin, cog, cog-railway, cogency, cogent, cogently, cogitate, cogitation, cognac, cognate, cognition, cognitive, cognizance, cognizant, cognoscente, cohabit, cohabitation, cohere, coherence, coherent, coherently, cohesion, cohesive,