"Most living beings are able to maintain their level in water by floating or crawling against gravity, and they react in virtue of the same power against centrifugal force. This mode of irritability is termed (negative) ‘geotaxy’ or ‘barotaxy’" (OED).

"I venture to propose the term ‘Syngamy’ to replace ‘fertilisation’ in its modern restricted sense‥; and the derivative adjectives ‘syngamic’ and ‘syngamous’ follow naturally" (OED).