| HONEYMONTHED | • HONEYMONTH v. (obsolete) to spend one's honeymoon, also HONEYMOON. | 
| HYDROPATHICS | • hydropathics n. Plural of hydropathic. • HYDROPATHIC n. a hotel (with special baths, etc., and often situated near a spa) where guests can have hydropathic treatment.
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| HYDROPATHIES | • hydropathies n. Plural of hydropathy. • HYDROPATHY n. the study of treating diseases with water.
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| HYDROPATHIST | • hydropathist n. An expert in hydropathy. • HYDROPATHIST n. one who treats with hydropathy.
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| HYDROPHILITE | • hydrophilite n. (Mineralogy) A soft white mineral formed from anhydrous calcium chloride. • HYDROPHILITE n. native calcium chloride.
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| HYDROPHYTONS | • HYDROPHYTON n. the coenosarc of a hydroid colony. | 
| HYDROPHYTOUS | • hydrophytous adj. Relating to hydrophytes. • hydrophytous adj. Relating to hydrophytons.
 • HYDROPHYTOUS adj. like a hydrophyte, also HYDROPHYTIC.
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| HYDROTHERAPY | • hydrotherapy n. (Alternative medicine) Any of various techniques that use water, either externally or internally, for… • HYDROTHERAPY n. therapy involving the use of water.
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| HYDROTHERMAL | • hydrothermal adj. Of, or relating to hot water. • hydrothermal adj. (Geology) Of or relating to emanations of hot water that are rich in minerals, or to the rocks formed from them.
 • HYDROTHERMAL adj. designating naturally hot underground water that has geological effects.
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| HYPERTHYROID | • hyperthyroid adj. Of or pertaining to hyperthyroidism. • HYPERTHYROID n. one affected with hyperthyroidism.
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| HYPOTHECATED | • hypothecated v. Simple past tense and past participle of hypothecate. • HYPOTHECATE v. to pledge as security without title or possession.
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| HYPOTHESISED | • hypothesised v. Simple past tense and past participle of hypothesise. • HYPOTHESISE v. to form a hypothesis, also HYPOTHESIZE, HYPOTHETISE, HYPOTHETIZE.
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| HYPOTHESIZED | • hypothesized v. Simple past tense and past participle of hypothesize. • HYPOTHESIZE v. to make a hypothesis, also HYPOTHESISE, HYPOTHETISE, HYPOTHETIZE.
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| HYPOTHETISED | • hypothetised v. Simple past tense and past participle of hypothetise. • HYPOTHETISE v. to form a hypothesis, also HYPOTHESISE, HYPOTHESIZE, HYPOTHETIZE.
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| HYPOTHETIZED | • hypothetized v. Simple past tense and past participle of hypothetize. • HYPOTHETIZE v. to form a hypothesis, also HYPOTHESISE, HYPOTHESIZE, HYPOTHETISE.
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| HYPOTHYROIDS | • HYPOTHYROID n. someone suffering from hypothyroidism. | 
| HYPOTROCHOID | • hypotrochoid n. (Geometry) A geometric curve traced by a fixed point on the radius line outside one circle which rotates… • HYPOTROCHOID n. the curve traced by a point on the radius, or radius produced, of a circle rolling within another circle.
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| ICHTHYOPSIDS | • ICHTHYOPSID n. a member of the Ichthyopsida, amphibians, fishes and fishlike vertebrates, also ICHTHYOPSIDAN. | 
| IDIORHYTHMIC | • idiorhythmic adj. Having its own rhythm or style. • IDIORHYTHMIC adj. self-regulating; allowing each member to regulate his or her own life, also IDIORRHYTHMIC.
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| PHOSPHATIDYL | • phosphatidyl n. (Organic chemistry) A radical derived from a phosphatide. • PHOSPHATIDYL n. any of several monovalent groups that are derived from phosphatidic acids.
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