1. The tendency of certain plant organs, as leaves, to assume special "sleeping" positions or make curl up under the influence of darkness

Derived forms: nyctitropisms

• hypoesthesia
• hypogammaglobulinemia
• hypogastric artery
• hypogastric plexus
• hypogastric vein
• hypogene
• hypogeum
• hypoglossal
• hypoglossal nerve
• hypoglycaemia
• hypoglycaemic
• hypoglycaemic agent
• hypoglycemia
• hypoglycemic
• hypoglycemic agent
• hypognathous
• hypogonadism
• hypogynous
• hypoid
• hypoid gear
• hypokalemia
• hypolipoproteinemia
• hyponasty
• hyponatremia
• hyponitrous acid